./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cf1a7837 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_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX --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 906036225f588312d23f50dd6f109319810cf1ead43ce885e134bcc5a0be0190 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-cf1a783 [2023-11-12 01:03:53,067 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-12 01:03:53,227 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-12 01:03:53,240 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-12 01:03:53,241 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-12 01:03:53,284 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-12 01:03:53,285 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-12 01:03:53,286 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-12 01:03:53,287 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-12 01:03:53,293 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-12 01:03:53,293 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-12 01:03:53,295 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-12 01:03:53,295 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-12 01:03:53,297 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-12 01:03:53,298 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-12 01:03:53,298 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-12 01:03:53,299 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-12 01:03:53,299 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-12 01:03:53,300 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-12 01:03:53,300 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-12 01:03:53,301 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-12 01:03:53,302 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-12 01:03:53,303 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-12 01:03:53,303 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-12 01:03:53,304 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-12 01:03:53,304 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-12 01:03:53,305 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-12 01:03:53,305 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-12 01:03:53,306 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-12 01:03:53,306 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-12 01:03:53,308 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-12 01:03:53,308 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-12 01:03:53,308 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-12 01:03:53,309 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-12 01:03:53,309 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-12 01:03:53,309 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-12 01:03:53,309 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:53,310 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-12 01:03:53,310 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-12 01:03:53,310 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-12 01:03:53,311 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-12 01:03:53,311 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-12 01:03:53,312 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-12 01:03:53,312 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-12 01:03:53,312 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-12 01:03:53,313 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_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 906036225f588312d23f50dd6f109319810cf1ead43ce885e134bcc5a0be0190 [2023-11-12 01:03:53,684 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-12 01:03:53,721 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-12 01:03:53,724 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-12 01:03:53,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-12 01:03:53,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-12 01:03:53,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-11-12 01:03:56,896 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-12 01:03:57,195 INFO L384 CDTParser]: Found 1 translation units. [2023-11-12 01:03:57,196 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-11-12 01:03:57,213 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/data/c9f6a2f77/b89c9ecddf914e1b8ff4e3a35f546c0b/FLAG00fc68e0e [2023-11-12 01:03:57,232 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/data/c9f6a2f77/b89c9ecddf914e1b8ff4e3a35f546c0b [2023-11-12 01:03:57,235 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-12 01:03:57,237 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-12 01:03:57,238 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:57,238 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-12 01:03:57,252 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-12 01:03:57,253 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,254 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@767627eb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57, skipping insertion in model container [2023-11-12 01:03:57,254 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,321 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-12 01:03:57,648 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_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c[14682,14695] [2023-11-12 01:03:57,652 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:57,665 INFO L202 MainTranslator]: Completed pre-run [2023-11-12 01:03:57,736 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_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c[14682,14695] [2023-11-12 01:03:57,737 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-12 01:03:57,755 INFO L206 MainTranslator]: Completed translation [2023-11-12 01:03:57,756 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57 WrapperNode [2023-11-12 01:03:57,756 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-12 01:03:57,757 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:57,757 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-12 01:03:57,757 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-12 01:03:57,768 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,783 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,833 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 497 [2023-11-12 01:03:57,834 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-12 01:03:57,835 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-12 01:03:57,835 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-12 01:03:57,835 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-12 01:03:57,844 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,845 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,851 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,851 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,876 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,885 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,901 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,904 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,913 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-12 01:03:57,918 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-12 01:03:57,918 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-12 01:03:57,918 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-12 01:03:57,919 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (1/1) ... [2023-11-12 01:03:57,926 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-12 01:03:57,937 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:03:57,964 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-12 01:03:58,002 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-12 01:03:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-11-12 01:03:58,018 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-11-12 01:03:58,018 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-12 01:03:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-11-12 01:03:58,019 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-11-12 01:03:58,019 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-11-12 01:03:58,021 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-11-12 01:03:58,022 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-11-12 01:03:58,022 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-11-12 01:03:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-12 01:03:58,023 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-12 01:03:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-12 01:03:58,023 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-11-12 01:03:58,023 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-11-12 01:03:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-12 01:03:58,024 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-12 01:03:58,024 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-11-12 01:03:58,024 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-11-12 01:03:58,193 INFO L236 CfgBuilder]: Building ICFG [2023-11-12 01:03:58,196 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-12 01:03:58,955 INFO L277 CfgBuilder]: Performing block encoding [2023-11-12 01:03:59,152 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-12 01:03:59,153 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-12 01:03:59,156 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:59 BoogieIcfgContainer [2023-11-12 01:03:59,156 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-12 01:03:59,159 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-12 01:03:59,159 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-12 01:03:59,163 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-12 01:03:59,163 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 12.11 01:03:57" (1/3) ... [2023-11-12 01:03:59,164 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f584208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:59, skipping insertion in model container [2023-11-12 01:03:59,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 12.11 01:03:57" (2/3) ... [2023-11-12 01:03:59,165 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f584208 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 12.11 01:03:59, skipping insertion in model container [2023-11-12 01:03:59,165 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 12.11 01:03:59" (3/3) ... [2023-11-12 01:03:59,167 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.1.ufo.UNBOUNDED.pals.c [2023-11-12 01:03:59,187 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-12 01:03:59,187 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-12 01:03:59,261 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-12 01:03:59,272 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;@60122433, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-12 01:03:59,273 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-12 01:03:59,280 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 01:03:59,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-12 01:03:59,291 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:03:59,291 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:03:59,292 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:03:59,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:03:59,301 INFO L85 PathProgramCache]: Analyzing trace with hash 940025637, now seen corresponding path program 1 times [2023-11-12 01:03:59,311 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:03:59,311 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [650504963] [2023-11-12 01:03:59,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:03:59,312 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:03:59,573 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:03:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:03:59,982 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:03:59,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [650504963] [2023-11-12 01:03:59,983 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [650504963] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:03:59,983 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:03:59,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:03:59,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809180793] [2023-11-12 01:03:59,988 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:03:59,993 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:03:59,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:00,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:00,043 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:00,046 INFO L87 Difference]: Start difference. First operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:00,265 INFO L93 Difference]: Finished difference Result 298 states and 487 transitions. [2023-11-12 01:04:00,266 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:00,267 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-12 01:04:00,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:00,281 INFO L225 Difference]: With dead ends: 298 [2023-11-12 01:04:00,281 INFO L226 Difference]: Without dead ends: 152 [2023-11-12 01:04:00,291 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 [2023-11-12 01:04:00,296 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:00,297 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 635 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:00,316 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-12 01:04:00,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-12 01:04:00,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 113 states have internal predecessors, (169), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-12 01:04:00,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2023-11-12 01:04:00,383 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2023-11-12 01:04:00,383 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:00,384 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2023-11-12 01:04:00,384 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-12 01:04:00,384 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2023-11-12 01:04:00,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-12 01:04:00,386 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:00,387 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:00,387 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-12 01:04:00,387 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:00,388 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:00,388 INFO L85 PathProgramCache]: Analyzing trace with hash -1579928659, now seen corresponding path program 1 times [2023-11-12 01:04:00,388 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:00,388 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [338787925] [2023-11-12 01:04:00,388 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:00,389 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:00,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:00,540 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:00,541 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:00,541 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [338787925] [2023-11-12 01:04:00,541 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [338787925] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:00,541 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:00,541 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:04:00,542 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176907307] [2023-11-12 01:04:00,542 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:00,543 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:00,543 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:00,544 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:00,544 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:00,545 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:04:00,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:00,731 INFO L93 Difference]: Finished difference Result 337 states and 512 transitions. [2023-11-12 01:04:00,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:00,731 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-11-12 01:04:00,732 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:00,734 INFO L225 Difference]: With dead ends: 337 [2023-11-12 01:04:00,734 INFO L226 Difference]: Without dead ends: 188 [2023-11-12 01:04:00,735 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:00,737 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 325 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:00,738 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 572 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:00,739 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-12 01:04:00,758 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-12 01:04:00,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.5106382978723405) internal successors, (213), 141 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2023-11-12 01:04:00,762 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 30 [2023-11-12 01:04:00,762 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:00,762 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2023-11-12 01:04:00,762 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:04:00,763 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2023-11-12 01:04:00,764 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-12 01:04:00,764 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:00,764 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:00,765 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-12 01:04:00,765 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:00,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:00,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2031615976, now seen corresponding path program 1 times [2023-11-12 01:04:00,766 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:00,766 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2057509763] [2023-11-12 01:04:00,766 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:00,766 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:00,861 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:01,020 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:01,020 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:01,021 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2057509763] [2023-11-12 01:04:01,021 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2057509763] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:01,023 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:01,023 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-12 01:04:01,024 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95057080] [2023-11-12 01:04:01,024 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:01,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-12 01:04:01,029 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:01,031 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-12 01:04:01,031 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:01,032 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:04:01,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:01,239 INFO L93 Difference]: Finished difference Result 337 states and 510 transitions. [2023-11-12 01:04:01,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-12 01:04:01,240 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-12 01:04:01,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:01,242 INFO L225 Difference]: With dead ends: 337 [2023-11-12 01:04:01,242 INFO L226 Difference]: Without dead ends: 188 [2023-11-12 01:04:01,243 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-12 01:04:01,245 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 321 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:01,246 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 575 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:01,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-12 01:04:01,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-12 01:04:01,268 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.50354609929078) internal successors, (212), 141 states have internal predecessors, (212), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:01,270 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2023-11-12 01:04:01,270 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 31 [2023-11-12 01:04:01,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:01,271 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2023-11-12 01:04:01,271 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-12 01:04:01,272 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2023-11-12 01:04:01,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-12 01:04:01,273 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:01,273 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:01,274 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-12 01:04:01,274 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:01,274 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:01,275 INFO L85 PathProgramCache]: Analyzing trace with hash 221392883, now seen corresponding path program 1 times [2023-11-12 01:04:01,275 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:01,275 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [231192767] [2023-11-12 01:04:01,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:01,275 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:01,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:01,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:01,457 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:01,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [231192767] [2023-11-12 01:04:01,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [231192767] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:01,458 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:01,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:01,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1700412220] [2023-11-12 01:04:01,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:01,459 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:04:01,459 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:01,460 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:01,460 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:01,460 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 01:04:01,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:01,556 INFO L93 Difference]: Finished difference Result 340 states and 514 transitions. [2023-11-12 01:04:01,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:01,557 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-12 01:04:01,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:01,560 INFO L225 Difference]: With dead ends: 340 [2023-11-12 01:04:01,560 INFO L226 Difference]: Without dead ends: 191 [2023-11-12 01:04:01,561 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:01,563 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:01,564 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 647 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:01,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-12 01:04:01,581 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-12 01:04:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:01,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2023-11-12 01:04:01,585 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 33 [2023-11-12 01:04:01,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:01,586 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2023-11-12 01:04:01,586 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-12 01:04:01,586 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2023-11-12 01:04:01,588 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-12 01:04:01,588 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:01,588 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:01,589 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-12 01:04:01,589 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:01,589 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:01,590 INFO L85 PathProgramCache]: Analyzing trace with hash 611086105, now seen corresponding path program 1 times [2023-11-12 01:04:01,590 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:01,590 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1905950737] [2023-11-12 01:04:01,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:01,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:01,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:01,769 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:01,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1905950737] [2023-11-12 01:04:01,770 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1905950737] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:01,770 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:01,770 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:01,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [64556784] [2023-11-12 01:04:01,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:01,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:04:01,772 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:01,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:01,773 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:01,773 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 01:04:01,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:01,869 INFO L93 Difference]: Finished difference Result 350 states and 525 transitions. [2023-11-12 01:04:01,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:01,870 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-11-12 01:04:01,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:01,872 INFO L225 Difference]: With dead ends: 350 [2023-11-12 01:04:01,873 INFO L226 Difference]: Without dead ends: 196 [2023-11-12 01:04:01,874 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:01,875 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:01,876 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:01,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-12 01:04:01,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-12 01:04:01,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:01,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2023-11-12 01:04:01,894 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2023-11-12 01:04:01,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:01,894 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2023-11-12 01:04:01,895 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-12 01:04:01,895 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2023-11-12 01:04:01,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 01:04:01,897 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:01,897 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] [2023-11-12 01:04:01,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-12 01:04:01,898 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:01,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:01,899 INFO L85 PathProgramCache]: Analyzing trace with hash 36466403, now seen corresponding path program 1 times [2023-11-12 01:04:01,899 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:01,899 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103273169] [2023-11-12 01:04:01,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:01,900 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,078 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:02,078 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:02,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103273169] [2023-11-12 01:04:02,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103273169] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:02,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:02,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:02,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [593321213] [2023-11-12 01:04:02,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:04:02,081 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:02,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:02,082 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 01:04:02,156 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:02,156 INFO L93 Difference]: Finished difference Result 359 states and 529 transitions. [2023-11-12 01:04:02,157 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:02,157 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-12 01:04:02,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:02,160 INFO L225 Difference]: With dead ends: 359 [2023-11-12 01:04:02,160 INFO L226 Difference]: Without dead ends: 200 [2023-11-12 01:04:02,161 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:02,162 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:02,163 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-12 01:04:02,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-12 01:04:02,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-12 01:04:02,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:02,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 291 transitions. [2023-11-12 01:04:02,180 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 291 transitions. Word has length 49 [2023-11-12 01:04:02,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:02,181 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 291 transitions. [2023-11-12 01:04:02,181 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 01:04:02,182 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 291 transitions. [2023-11-12 01:04:02,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-12 01:04:02,183 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:02,184 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:02,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-12 01:04:02,184 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:02,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:02,185 INFO L85 PathProgramCache]: Analyzing trace with hash -1862041590, now seen corresponding path program 1 times [2023-11-12 01:04:02,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:02,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [917852190] [2023-11-12 01:04:02,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:02,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:02,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,376 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-12 01:04:02,376 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:02,376 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [917852190] [2023-11-12 01:04:02,376 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [917852190] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:02,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:02,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:02,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176779106] [2023-11-12 01:04:02,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,378 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:04:02,378 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,379 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:02,379 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:02,379 INFO L87 Difference]: Start difference. First operand 200 states and 291 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 01:04:02,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:02,482 INFO L93 Difference]: Finished difference Result 368 states and 539 transitions. [2023-11-12 01:04:02,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:02,483 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-12 01:04:02,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:02,485 INFO L225 Difference]: With dead ends: 368 [2023-11-12 01:04:02,486 INFO L226 Difference]: Without dead ends: 205 [2023-11-12 01:04:02,487 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:02,488 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:02,488 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:02,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-12 01:04:02,503 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-12 01:04:02,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:02,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2023-11-12 01:04:02,507 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 49 [2023-11-12 01:04:02,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:02,508 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2023-11-12 01:04:02,509 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-12 01:04:02,509 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2023-11-12 01:04:02,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-12 01:04:02,511 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:02,511 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:02,511 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-12 01:04:02,512 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:02,512 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:02,512 INFO L85 PathProgramCache]: Analyzing trace with hash 2131134058, now seen corresponding path program 1 times [2023-11-12 01:04:02,513 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:02,513 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325271819] [2023-11-12 01:04:02,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:02,513 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:02,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:02,804 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-12 01:04:02,804 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:02,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325271819] [2023-11-12 01:04:02,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325271819] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:02,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-12 01:04:02,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-12 01:04:02,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814611659] [2023-11-12 01:04:02,806 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:02,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-12 01:04:02,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:02,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-12 01:04:02,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-12 01:04:02,810 INFO L87 Difference]: Start difference. First operand 205 states and 295 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:04:02,892 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:02,893 INFO L93 Difference]: Finished difference Result 379 states and 546 transitions. [2023-11-12 01:04:02,893 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-12 01:04:02,894 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2023-11-12 01:04:02,895 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:02,900 INFO L225 Difference]: With dead ends: 379 [2023-11-12 01:04:02,900 INFO L226 Difference]: Without dead ends: 211 [2023-11-12 01:04:02,901 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-12 01:04:02,903 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 7 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:02,904 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-12 01:04:02,905 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-12 01:04:02,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-12 01:04:02,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-12 01:04:02,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2023-11-12 01:04:02,931 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 57 [2023-11-12 01:04:02,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:02,932 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2023-11-12 01:04:02,932 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-12 01:04:02,933 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2023-11-12 01:04:02,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-12 01:04:02,934 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:02,934 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:02,935 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-12 01:04:02,935 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:02,936 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:02,936 INFO L85 PathProgramCache]: Analyzing trace with hash -180629249, now seen corresponding path program 1 times [2023-11-12 01:04:02,936 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:02,936 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954175559] [2023-11-12 01:04:02,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:02,937 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:03,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:03,535 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:04:03,535 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:03,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954175559] [2023-11-12 01:04:03,536 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1954175559] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:03,536 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [635819655] [2023-11-12 01:04:03,536 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:03,536 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:03,537 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:03,540 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:03,566 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-12 01:04:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:03,709 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 13 conjunts are in the unsatisfiable core [2023-11-12 01:04:03,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:04,001 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2023-11-12 01:04:04,001 INFO L323 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2023-11-12 01:04:04,002 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [635819655] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:04,002 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2023-11-12 01:04:04,002 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [9] total 14 [2023-11-12 01:04:04,003 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216318497] [2023-11-12 01:04:04,003 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:04,004 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2023-11-12 01:04:04,004 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:04,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2023-11-12 01:04:04,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=151, Unknown=0, NotChecked=0, Total=182 [2023-11-12 01:04:04,007 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 01:04:04,506 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:04,506 INFO L93 Difference]: Finished difference Result 598 states and 836 transitions. [2023-11-12 01:04:04,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2023-11-12 01:04:04,507 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) Word has length 60 [2023-11-12 01:04:04,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:04,511 INFO L225 Difference]: With dead ends: 598 [2023-11-12 01:04:04,511 INFO L226 Difference]: Without dead ends: 398 [2023-11-12 01:04:04,512 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 56 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2023-11-12 01:04:04,515 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 219 mSDsluCounter, 935 mSDsCounter, 0 mSdLazyCounter, 196 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 220 SdHoareTripleChecker+Valid, 1151 SdHoareTripleChecker+Invalid, 199 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 196 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:04,515 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [220 Valid, 1151 Invalid, 199 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 196 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-12 01:04:04,517 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 398 states. [2023-11-12 01:04:04,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 398 to 395. [2023-11-12 01:04:04,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 395 states, 299 states have (on average 1.4214046822742474) internal successors, (425), 300 states have internal predecessors, (425), 65 states have call successors, (65), 30 states have call predecessors, (65), 30 states have return successors, (65), 64 states have call predecessors, (65), 65 states have call successors, (65) [2023-11-12 01:04:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 395 states to 395 states and 555 transitions. [2023-11-12 01:04:04,558 INFO L78 Accepts]: Start accepts. Automaton has 395 states and 555 transitions. Word has length 60 [2023-11-12 01:04:04,559 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:04,559 INFO L495 AbstractCegarLoop]: Abstraction has 395 states and 555 transitions. [2023-11-12 01:04:04,559 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 6 states have (on average 7.5) internal successors, (45), 8 states have internal predecessors, (45), 4 states have call successors, (8), 3 states have call predecessors, (8), 4 states have return successors, (7), 3 states have call predecessors, (7), 4 states have call successors, (7) [2023-11-12 01:04:04,559 INFO L276 IsEmpty]: Start isEmpty. Operand 395 states and 555 transitions. [2023-11-12 01:04:04,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 01:04:04,562 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:04,562 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:04,575 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-12 01:04:04,770 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:04,770 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:04,771 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:04,771 INFO L85 PathProgramCache]: Analyzing trace with hash 361908346, now seen corresponding path program 1 times [2023-11-12 01:04:04,771 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:04,772 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942286468] [2023-11-12 01:04:04,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:04,772 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:04,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:05,411 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:04:05,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942286468] [2023-11-12 01:04:05,412 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1942286468] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:05,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [101739508] [2023-11-12 01:04:05,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:05,413 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:05,413 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:05,415 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:05,425 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-12 01:04:05,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:05,619 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:04:05,627 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:06,433 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:06,434 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:06,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:04:06,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [101739508] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:06,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [749035474] [2023-11-12 01:04:06,686 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-12 01:04:06,687 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:04:06,691 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:04:06,697 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:04:06,698 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:04:15,415 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 134 for LOIs [2023-11-12 01:04:15,662 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-11-12 01:04:15,691 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-11-12 01:04:15,767 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:04:24,671 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [749035474] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:24,671 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:24,671 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2023-11-12 01:04:24,672 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955193482] [2023-11-12 01:04:24,672 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:24,673 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 01:04:24,673 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:24,674 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 01:04:24,675 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=139, Invalid=1267, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 01:04:24,675 INFO L87 Difference]: Start difference. First operand 395 states and 555 transitions. Second operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 01:04:30,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-12 01:04:30,205 INFO L93 Difference]: Finished difference Result 883 states and 1229 transitions. [2023-11-12 01:04:30,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2023-11-12 01:04:30,206 INFO L78 Accepts]: Start accepts. Automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 62 [2023-11-12 01:04:30,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-12 01:04:30,211 INFO L225 Difference]: With dead ends: 883 [2023-11-12 01:04:30,211 INFO L226 Difference]: Without dead ends: 528 [2023-11-12 01:04:30,213 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 197 GetRequests, 150 SyntacticMatches, 7 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 10.6s TimeCoverageRelationStatistics Valid=167, Invalid=1555, Unknown=0, NotChecked=0, Total=1722 [2023-11-12 01:04:30,214 INFO L413 NwaCegarLoop]: 284 mSDtfsCounter, 176 mSDsluCounter, 2965 mSDsCounter, 0 mSdLazyCounter, 2022 mSolverCounterSat, 47 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 198 SdHoareTripleChecker+Valid, 3249 SdHoareTripleChecker+Invalid, 2069 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 47 IncrementalHoareTripleChecker+Valid, 2022 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-12 01:04:30,214 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [198 Valid, 3249 Invalid, 2069 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [47 Valid, 2022 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-12 01:04:30,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 528 states. [2023-11-12 01:04:30,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 528 to 375. [2023-11-12 01:04:30,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 375 states, 281 states have (on average 1.3807829181494662) internal successors, (388), 283 states have internal predecessors, (388), 63 states have call successors, (63), 30 states have call predecessors, (63), 30 states have return successors, (63), 61 states have call predecessors, (63), 63 states have call successors, (63) [2023-11-12 01:04:30,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 375 states to 375 states and 514 transitions. [2023-11-12 01:04:30,287 INFO L78 Accepts]: Start accepts. Automaton has 375 states and 514 transitions. Word has length 62 [2023-11-12 01:04:30,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-12 01:04:30,288 INFO L495 AbstractCegarLoop]: Abstraction has 375 states and 514 transitions. [2023-11-12 01:04:30,288 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-12 01:04:30,288 INFO L276 IsEmpty]: Start isEmpty. Operand 375 states and 514 transitions. [2023-11-12 01:04:30,290 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-12 01:04:30,290 INFO L187 NwaCegarLoop]: Found error trace [2023-11-12 01:04:30,290 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, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-12 01:04:30,299 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Ended with exit code 0 [2023-11-12 01:04:30,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2023-11-12 01:04:30,497 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-12 01:04:30,497 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-12 01:04:30,497 INFO L85 PathProgramCache]: Analyzing trace with hash 2121358426, now seen corresponding path program 1 times [2023-11-12 01:04:30,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-12 01:04:30,498 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1710328007] [2023-11-12 01:04:30,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:30,498 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-12 01:04:30,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:30,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:04:30,948 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-12 01:04:30,948 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1710328007] [2023-11-12 01:04:30,948 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1710328007] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-12 01:04:30,949 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [725233422] [2023-11-12 01:04:30,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-12 01:04:30,949 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-12 01:04:30,949 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 [2023-11-12 01:04:30,950 INFO L229 MonitoredProcess]: Starting monitored process 4 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-12 01:04:30,966 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_6c13b251-b5ae-4e46-a546-3fb1a0c0e183/bin/utaipan-verify-NcY6lQBIFX/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2023-11-12 01:04:31,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-12 01:04:31,096 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-12 01:04:31,100 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-12 01:04:31,501 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-12 01:04:31,501 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-12 01:04:31,660 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-12 01:04:31,660 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [725233422] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-12 01:04:31,660 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [662360687] [2023-11-12 01:04:31,664 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-12 01:04:31,664 INFO L166 IcfgInterpreter]: Building call graph [2023-11-12 01:04:31,665 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-12 01:04:31,665 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-12 01:04:31,665 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-12 01:04:36,958 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 132 for LOIs [2023-11-12 01:04:37,168 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 111 for LOIs [2023-11-12 01:04:37,182 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-11-12 01:04:37,248 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-12 01:04:45,292 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [662360687] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-12 01:04:45,292 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-12 01:04:45,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [26] imperfect sequences [9, 9, 9] total 38 [2023-11-12 01:04:45,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1650125989] [2023-11-12 01:04:45,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-12 01:04:45,294 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 27 states [2023-11-12 01:04:45,294 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-12 01:04:45,295 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 27 interpolants. [2023-11-12 01:04:45,296 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=160, Invalid=1246, Unknown=0, NotChecked=0, Total=1406 [2023-11-12 01:04:45,297 INFO L87 Difference]: Start difference. First operand 375 states and 514 transitions. Second operand has 27 states, 22 states have (on average 1.9545454545454546) internal successors, (43), 19 states have internal predecessors, (43), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7)