./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 4fc63b2a 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_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2 --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 cdd691469d2e12c2dd1871c48be4dd2db0b9d27541ac5dee5ff25a04db0d98eb --- Real Ultimate output --- This is Ultimate 0.2.5-dev-4fc63b2 [2024-11-02 12:36:17,236 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-11-02 12:36:17,342 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/config/svcomp-Reach-32bit-Taipan_Default.epf [2024-11-02 12:36:17,350 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-11-02 12:36:17,350 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-11-02 12:36:17,383 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-11-02 12:36:17,383 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-11-02 12:36:17,384 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-11-02 12:36:17,384 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-11-02 12:36:17,385 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-11-02 12:36:17,385 INFO L153 SettingsManager]: * User list type=DISABLED [2024-11-02 12:36:17,386 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2024-11-02 12:36:17,386 INFO L153 SettingsManager]: * Explicit value domain=true [2024-11-02 12:36:17,387 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2024-11-02 12:36:17,387 INFO L153 SettingsManager]: * Octagon Domain=false [2024-11-02 12:36:17,387 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2024-11-02 12:36:17,388 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2024-11-02 12:36:17,388 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2024-11-02 12:36:17,389 INFO L153 SettingsManager]: * Interval Domain=false [2024-11-02 12:36:17,389 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2024-11-02 12:36:17,390 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2024-11-02 12:36:17,390 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2024-11-02 12:36:17,395 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-11-02 12:36:17,396 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-11-02 12:36:17,396 INFO L153 SettingsManager]: * sizeof long=4 [2024-11-02 12:36:17,396 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-11-02 12:36:17,397 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-11-02 12:36:17,397 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-11-02 12:36:17,397 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-11-02 12:36:17,397 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-11-02 12:36:17,398 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-11-02 12:36:17,398 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-11-02 12:36:17,400 INFO L153 SettingsManager]: * sizeof long double=12 [2024-11-02 12:36:17,400 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-11-02 12:36:17,400 INFO L153 SettingsManager]: * Use constant arrays=true [2024-11-02 12:36:17,401 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-11-02 12:36:17,401 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-11-02 12:36:17,401 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-11-02 12:36:17,401 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:17,402 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-11-02 12:36:17,402 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-11-02 12:36:17,403 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-11-02 12:36:17,403 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2024-11-02 12:36:17,404 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-11-02 12:36:17,404 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-11-02 12:36:17,404 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2024-11-02 12:36:17,405 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-11-02 12:36:17,405 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_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2 Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> cdd691469d2e12c2dd1871c48be4dd2db0b9d27541ac5dee5ff25a04db0d98eb [2024-11-02 12:36:17,722 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-11-02 12:36:17,748 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-11-02 12:36:17,751 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-11-02 12:36:17,753 INFO L270 PluginConnector]: Initializing CDTParser... [2024-11-02 12:36:17,753 INFO L274 PluginConnector]: CDTParser initialized [2024-11-02 12:36:17,754 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c Unable to find full path for "g++" [2024-11-02 12:36:19,783 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-11-02 12:36:20,032 INFO L384 CDTParser]: Found 1 translation units. [2024-11-02 12:36:20,032 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2024-11-02 12:36:20,044 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/data/df578ceb1/49f23feda2e34d55868cbb084a8be2ba/FLAGa9cff02b0 [2024-11-02 12:36:20,067 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/data/df578ceb1/49f23feda2e34d55868cbb084a8be2ba [2024-11-02 12:36:20,069 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-11-02 12:36:20,071 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2024-11-02 12:36:20,072 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:20,072 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-11-02 12:36:20,078 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-11-02 12:36:20,079 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,080 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@62e3cdb4 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20, skipping insertion in model container [2024-11-02 12:36:20,081 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,125 INFO L175 MainTranslator]: Built tables and reachable declarations [2024-11-02 12:36:20,445 WARN L251 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_556d8475-e6c1-4500-badb-4ff0378f7e3a/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2024-11-02 12:36:20,449 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:20,461 INFO L200 MainTranslator]: Completed pre-run [2024-11-02 12:36:20,551 WARN L251 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_556d8475-e6c1-4500-badb-4ff0378f7e3a/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c[14702,14715] [2024-11-02 12:36:20,554 INFO L210 PostProcessor]: Analyzing one entry point: main [2024-11-02 12:36:20,576 INFO L204 MainTranslator]: Completed translation [2024-11-02 12:36:20,577 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20 WrapperNode [2024-11-02 12:36:20,577 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-11-02 12:36:20,578 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:20,578 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-11-02 12:36:20,578 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-11-02 12:36:20,584 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,597 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,641 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 510 [2024-11-02 12:36:20,642 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-11-02 12:36:20,643 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-11-02 12:36:20,643 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-11-02 12:36:20,643 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-11-02 12:36:20,654 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,654 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,663 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,663 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,678 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,684 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,687 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,690 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,695 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-11-02 12:36:20,696 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-11-02 12:36:20,696 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-11-02 12:36:20,696 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-11-02 12:36:20,697 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (1/1) ... [2024-11-02 12:36:20,711 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2024-11-02 12:36:20,738 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:20,771 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2024-11-02 12:36:20,775 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2024-11-02 12:36:20,810 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2024-11-02 12:36:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2024-11-02 12:36:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-11-02 12:36:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2024-11-02 12:36:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2024-11-02 12:36:20,811 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2024-11-02 12:36:20,811 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2024-11-02 12:36:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2024-11-02 12:36:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2024-11-02 12:36:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2024-11-02 12:36:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2024-11-02 12:36:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2024-11-02 12:36:20,812 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2024-11-02 12:36:20,812 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2024-11-02 12:36:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-11-02 12:36:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-11-02 12:36:20,813 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2024-11-02 12:36:20,813 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2024-11-02 12:36:20,975 INFO L238 CfgBuilder]: Building ICFG [2024-11-02 12:36:20,978 INFO L264 CfgBuilder]: Building CFG for each procedure with an implementation [2024-11-02 12:36:21,860 INFO L? ?]: Removed 115 outVars from TransFormulas that were not future-live. [2024-11-02 12:36:21,860 INFO L287 CfgBuilder]: Performing block encoding [2024-11-02 12:36:22,110 INFO L311 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-11-02 12:36:22,111 INFO L316 CfgBuilder]: Removed 1 assume(true) statements. [2024-11-02 12:36:22,113 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:22 BoogieIcfgContainer [2024-11-02 12:36:22,113 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-11-02 12:36:22,115 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-11-02 12:36:22,115 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-11-02 12:36:22,120 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-11-02 12:36:22,120 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 02.11 12:36:20" (1/3) ... [2024-11-02 12:36:22,121 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285cad70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:22, skipping insertion in model container [2024-11-02 12:36:22,121 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 02.11 12:36:20" (2/3) ... [2024-11-02 12:36:22,123 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@285cad70 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 02.11 12:36:22, skipping insertion in model container [2024-11-02 12:36:22,123 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 02.11 12:36:22" (3/3) ... [2024-11-02 12:36:22,125 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.4_2.ufo.BOUNDED-10.pals.c [2024-11-02 12:36:22,148 INFO L214 ceAbstractionStarter]: Automizer settings: Hoare:LoopHeads NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-11-02 12:36:22,148 INFO L154 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2024-11-02 12:36:22,263 INFO L332 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-11-02 12:36:22,270 INFO L333 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, 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;@26b0602a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-11-02 12:36:22,270 INFO L334 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2024-11-02 12:36:22,276 INFO L276 IsEmpty]: Start isEmpty. Operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 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) [2024-11-02 12:36:22,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2024-11-02 12:36:22,287 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:22,287 INFO L215 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-11-02 12:36:22,288 INFO L396 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:22,294 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:22,294 INFO L85 PathProgramCache]: Analyzing trace with hash 40747137, now seen corresponding path program 1 times [2024-11-02 12:36:22,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1274733211] [2024-11-02 12:36:22,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:22,572 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:23,050 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:23,050 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:23,051 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1274733211] [2024-11-02 12:36:23,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1274733211] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:23,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:23,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:23,054 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166634081] [2024-11-02 12:36:23,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:23,059 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:23,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:23,081 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:23,082 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:23,084 INFO L87 Difference]: Start difference. First operand has 150 states, 110 states have (on average 1.5363636363636364) internal successors, (169), 111 states have internal predecessors, (169), 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) [2024-11-02 12:36:23,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:23,245 INFO L93 Difference]: Finished difference Result 301 states and 489 transitions. [2024-11-02 12:36:23,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:23,248 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 [2024-11-02 12:36:23,249 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:23,260 INFO L225 Difference]: With dead ends: 301 [2024-11-02 12:36:23,261 INFO L226 Difference]: Without dead ends: 153 [2024-11-02 12:36:23,268 INFO L431 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 [2024-11-02 12:36:23,273 INFO L432 NwaCegarLoop]: 216 mSDtfsCounter, 3 mSDsluCounter, 422 mSDsCounter, 0 mSdLazyCounter, 48 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 638 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 48 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:23,275 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 638 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 48 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:23,296 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2024-11-02 12:36:23,343 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 153. [2024-11-02 12:36:23,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 153 states, 113 states have (on average 1.5044247787610618) internal successors, (170), 113 states have internal predecessors, (170), 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) [2024-11-02 12:36:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 232 transitions. [2024-11-02 12:36:23,362 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 232 transitions. Word has length 19 [2024-11-02 12:36:23,362 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:23,366 INFO L471 AbstractCegarLoop]: Abstraction has 153 states and 232 transitions. [2024-11-02 12:36:23,366 INFO L472 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) [2024-11-02 12:36:23,367 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 232 transitions. [2024-11-02 12:36:23,368 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2024-11-02 12:36:23,368 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:23,369 INFO L215 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] [2024-11-02 12:36:23,369 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-11-02 12:36:23,373 INFO L396 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:23,374 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:23,374 INFO L85 PathProgramCache]: Analyzing trace with hash 1970414766, now seen corresponding path program 1 times [2024-11-02 12:36:23,409 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:23,410 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [727138085] [2024-11-02 12:36:23,410 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:23,412 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:23,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:23,730 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:23,734 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:23,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [727138085] [2024-11-02 12:36:23,735 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [727138085] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:23,735 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:23,736 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:36:23,736 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [579014762] [2024-11-02 12:36:23,737 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:23,738 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:36:23,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:23,740 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:36:23,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:23,744 INFO L87 Difference]: Start difference. First operand 153 states and 232 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) [2024-11-02 12:36:24,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:24,076 INFO L93 Difference]: Finished difference Result 339 states and 514 transitions. [2024-11-02 12:36:24,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:36:24,084 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 [2024-11-02 12:36:24,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:24,086 INFO L225 Difference]: With dead ends: 339 [2024-11-02 12:36:24,086 INFO L226 Difference]: Without dead ends: 189 [2024-11-02 12:36:24,090 INFO L431 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 [2024-11-02 12:36:24,091 INFO L432 NwaCegarLoop]: 194 mSDtfsCounter, 325 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:24,092 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 575 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:24,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2024-11-02 12:36:24,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 187. [2024-11-02 12:36:24,135 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5070422535211268) internal successors, (214), 142 states have internal predecessors, (214), 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) [2024-11-02 12:36:24,140 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 282 transitions. [2024-11-02 12:36:24,140 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 282 transitions. Word has length 30 [2024-11-02 12:36:24,141 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:24,141 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 282 transitions. [2024-11-02 12:36:24,141 INFO L472 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) [2024-11-02 12:36:24,141 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 282 transitions. [2024-11-02 12:36:24,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2024-11-02 12:36:24,145 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,145 INFO L215 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] [2024-11-02 12:36:24,145 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-11-02 12:36:24,145 INFO L396 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:24,147 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,148 INFO L85 PathProgramCache]: Analyzing trace with hash -1303988349, now seen corresponding path program 1 times [2024-11-02 12:36:24,148 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:24,148 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265009696] [2024-11-02 12:36:24,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,148 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:24,199 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,339 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:24,339 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:24,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265009696] [2024-11-02 12:36:24,340 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265009696] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:24,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:24,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-11-02 12:36:24,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033522229] [2024-11-02 12:36:24,341 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:24,341 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-11-02 12:36:24,341 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:24,342 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-11-02 12:36:24,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2024-11-02 12:36:24,343 INFO L87 Difference]: Start difference. First operand 187 states and 282 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) [2024-11-02 12:36:24,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:24,674 INFO L93 Difference]: Finished difference Result 338 states and 511 transitions. [2024-11-02 12:36:24,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-11-02 12:36:24,675 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 [2024-11-02 12:36:24,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:24,677 INFO L225 Difference]: With dead ends: 338 [2024-11-02 12:36:24,677 INFO L226 Difference]: Without dead ends: 188 [2024-11-02 12:36:24,678 INFO L431 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 [2024-11-02 12:36:24,683 INFO L432 NwaCegarLoop]: 195 mSDtfsCounter, 320 mSDsluCounter, 383 mSDsCounter, 0 mSdLazyCounter, 98 mSolverCounterSat, 13 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 320 SdHoareTripleChecker+Valid, 578 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 13 IncrementalHoareTripleChecker+Valid, 98 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:24,683 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [320 Valid, 578 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [13 Valid, 98 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2024-11-02 12:36:24,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2024-11-02 12:36:24,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 187. [2024-11-02 12:36:24,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 187 states, 142 states have (on average 1.5) internal successors, (213), 142 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) [2024-11-02 12:36:24,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 187 states to 187 states and 281 transitions. [2024-11-02 12:36:24,718 INFO L78 Accepts]: Start accepts. Automaton has 187 states and 281 transitions. Word has length 31 [2024-11-02 12:36:24,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:24,718 INFO L471 AbstractCegarLoop]: Abstraction has 187 states and 281 transitions. [2024-11-02 12:36:24,719 INFO L472 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) [2024-11-02 12:36:24,719 INFO L276 IsEmpty]: Start isEmpty. Operand 187 states and 281 transitions. [2024-11-02 12:36:24,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2024-11-02 12:36:24,720 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:24,722 INFO L215 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] [2024-11-02 12:36:24,722 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-11-02 12:36:24,722 INFO L396 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:24,723 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:24,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1186970131, now seen corresponding path program 1 times [2024-11-02 12:36:24,723 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:24,723 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517101117] [2024-11-02 12:36:24,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:24,723 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:24,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:24,991 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:24,992 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:24,992 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517101117] [2024-11-02 12:36:24,992 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [517101117] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:24,992 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:24,992 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:24,992 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035223419] [2024-11-02 12:36:24,993 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:24,993 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:24,993 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:24,993 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:24,994 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:24,994 INFO L87 Difference]: Start difference. First operand 187 states and 281 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) [2024-11-02 12:36:25,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,088 INFO L93 Difference]: Finished difference Result 342 states and 516 transitions. [2024-11-02 12:36:25,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:25,089 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 [2024-11-02 12:36:25,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,091 INFO L225 Difference]: With dead ends: 342 [2024-11-02 12:36:25,091 INFO L226 Difference]: Without dead ends: 192 [2024-11-02 12:36:25,092 INFO L431 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 [2024-11-02 12:36:25,098 INFO L432 NwaCegarLoop]: 218 mSDtfsCounter, 4 mSDsluCounter, 432 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 650 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 [2024-11-02 12:36:25,100 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 650 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,101 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2024-11-02 12:36:25,126 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 192. [2024-11-02 12:36:25,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 192 states, 146 states have (on average 1.4863013698630136) internal successors, (217), 146 states have internal predecessors, (217), 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) [2024-11-02 12:36:25,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 192 states to 192 states and 285 transitions. [2024-11-02 12:36:25,130 INFO L78 Accepts]: Start accepts. Automaton has 192 states and 285 transitions. Word has length 33 [2024-11-02 12:36:25,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:25,131 INFO L471 AbstractCegarLoop]: Abstraction has 192 states and 285 transitions. [2024-11-02 12:36:25,131 INFO L472 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) [2024-11-02 12:36:25,131 INFO L276 IsEmpty]: Start isEmpty. Operand 192 states and 285 transitions. [2024-11-02 12:36:25,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2024-11-02 12:36:25,132 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:25,133 INFO L215 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] [2024-11-02 12:36:25,133 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-11-02 12:36:25,133 INFO L396 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:25,133 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:25,134 INFO L85 PathProgramCache]: Analyzing trace with hash -558969229, now seen corresponding path program 1 times [2024-11-02 12:36:25,136 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:25,137 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1473298367] [2024-11-02 12:36:25,137 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:25,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,447 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:25,448 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,448 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1473298367] [2024-11-02 12:36:25,449 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1473298367] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,449 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,449 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:25,449 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264140269] [2024-11-02 12:36:25,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,450 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:25,451 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,452 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:25,452 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:25,453 INFO L87 Difference]: Start difference. First operand 192 states and 285 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) [2024-11-02 12:36:25,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,559 INFO L93 Difference]: Finished difference Result 352 states and 527 transitions. [2024-11-02 12:36:25,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:25,559 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 [2024-11-02 12:36:25,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,561 INFO L225 Difference]: With dead ends: 352 [2024-11-02 12:36:25,561 INFO L226 Difference]: Without dead ends: 197 [2024-11-02 12:36:25,562 INFO L431 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 [2024-11-02 12:36:25,563 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 636 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 [2024-11-02 12:36:25,563 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2024-11-02 12:36:25,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 197. [2024-11-02 12:36:25,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 197 states, 150 states have (on average 1.4733333333333334) internal successors, (221), 150 states have internal predecessors, (221), 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) [2024-11-02 12:36:25,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 197 states to 197 states and 289 transitions. [2024-11-02 12:36:25,578 INFO L78 Accepts]: Start accepts. Automaton has 197 states and 289 transitions. Word has length 41 [2024-11-02 12:36:25,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:25,580 INFO L471 AbstractCegarLoop]: Abstraction has 197 states and 289 transitions. [2024-11-02 12:36:25,580 INFO L472 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) [2024-11-02 12:36:25,580 INFO L276 IsEmpty]: Start isEmpty. Operand 197 states and 289 transitions. [2024-11-02 12:36:25,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 12:36:25,581 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:25,582 INFO L215 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] [2024-11-02 12:36:25,582 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-11-02 12:36:25,582 INFO L396 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:25,582 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:25,582 INFO L85 PathProgramCache]: Analyzing trace with hash 1945352093, now seen corresponding path program 1 times [2024-11-02 12:36:25,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:25,585 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555037999] [2024-11-02 12:36:25,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:25,585 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:25,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:25,854 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:25,855 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:25,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555037999] [2024-11-02 12:36:25,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1555037999] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:25,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:25,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:25,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492304459] [2024-11-02 12:36:25,856 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:25,856 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:25,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:25,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:25,857 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:25,859 INFO L87 Difference]: Start difference. First operand 197 states and 289 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) [2024-11-02 12:36:25,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:25,961 INFO L93 Difference]: Finished difference Result 361 states and 531 transitions. [2024-11-02 12:36:25,963 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:25,963 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 [2024-11-02 12:36:25,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:25,965 INFO L225 Difference]: With dead ends: 361 [2024-11-02 12:36:25,966 INFO L226 Difference]: Without dead ends: 201 [2024-11-02 12:36:25,966 INFO L431 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 [2024-11-02 12:36:25,969 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 3 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 3 SdHoareTripleChecker+Valid, 646 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:25,970 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [3 Valid, 646 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:25,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2024-11-02 12:36:26,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 201. [2024-11-02 12:36:26,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 201 states, 153 states have (on average 1.4640522875816993) internal successors, (224), 153 states have internal predecessors, (224), 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) [2024-11-02 12:36:26,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 201 states to 201 states and 292 transitions. [2024-11-02 12:36:26,004 INFO L78 Accepts]: Start accepts. Automaton has 201 states and 292 transitions. Word has length 49 [2024-11-02 12:36:26,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:26,005 INFO L471 AbstractCegarLoop]: Abstraction has 201 states and 292 transitions. [2024-11-02 12:36:26,005 INFO L472 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) [2024-11-02 12:36:26,006 INFO L276 IsEmpty]: Start isEmpty. Operand 201 states and 292 transitions. [2024-11-02 12:36:26,008 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2024-11-02 12:36:26,012 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:26,012 INFO L215 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] [2024-11-02 12:36:26,012 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-11-02 12:36:26,012 INFO L396 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:26,013 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:26,013 INFO L85 PathProgramCache]: Analyzing trace with hash 46844100, now seen corresponding path program 1 times [2024-11-02 12:36:26,013 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:26,013 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2106271678] [2024-11-02 12:36:26,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:26,014 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:26,055 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:26,265 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2024-11-02 12:36:26,266 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:26,266 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2106271678] [2024-11-02 12:36:26,267 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2106271678] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:26,267 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:26,267 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:26,267 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1239484655] [2024-11-02 12:36:26,267 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:26,268 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:26,268 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:26,268 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:26,269 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:26,269 INFO L87 Difference]: Start difference. First operand 201 states and 292 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) [2024-11-02 12:36:26,383 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:26,384 INFO L93 Difference]: Finished difference Result 370 states and 541 transitions. [2024-11-02 12:36:26,384 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:26,385 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 [2024-11-02 12:36:26,385 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:26,386 INFO L225 Difference]: With dead ends: 370 [2024-11-02 12:36:26,387 INFO L226 Difference]: Without dead ends: 206 [2024-11-02 12:36:26,387 INFO L431 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 [2024-11-02 12:36:26,388 INFO L432 NwaCegarLoop]: 215 mSDtfsCounter, 4 mSDsluCounter, 421 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 4 SdHoareTripleChecker+Valid, 636 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 [2024-11-02 12:36:26,389 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [4 Valid, 636 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:26,390 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2024-11-02 12:36:26,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 206. [2024-11-02 12:36:26,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 206 states, 157 states have (on average 1.4522292993630572) internal successors, (228), 157 states have internal predecessors, (228), 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) [2024-11-02 12:36:26,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 206 states to 206 states and 296 transitions. [2024-11-02 12:36:26,403 INFO L78 Accepts]: Start accepts. Automaton has 206 states and 296 transitions. Word has length 49 [2024-11-02 12:36:26,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:26,403 INFO L471 AbstractCegarLoop]: Abstraction has 206 states and 296 transitions. [2024-11-02 12:36:26,404 INFO L472 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) [2024-11-02 12:36:26,404 INFO L276 IsEmpty]: Start isEmpty. Operand 206 states and 296 transitions. [2024-11-02 12:36:26,405 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2024-11-02 12:36:26,405 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:26,406 INFO L215 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] [2024-11-02 12:36:26,406 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-11-02 12:36:26,406 INFO L396 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:26,407 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:26,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1703784644, now seen corresponding path program 1 times [2024-11-02 12:36:26,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:26,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1358946980] [2024-11-02 12:36:26,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:26,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:26,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:26,727 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2024-11-02 12:36:26,729 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:26,729 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1358946980] [2024-11-02 12:36:26,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1358946980] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:26,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-11-02 12:36:26,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-11-02 12:36:26,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175924036] [2024-11-02 12:36:26,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:26,731 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-11-02 12:36:26,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:26,732 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-11-02 12:36:26,732 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2024-11-02 12:36:26,733 INFO L87 Difference]: Start difference. First operand 206 states and 296 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) [2024-11-02 12:36:26,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:26,851 INFO L93 Difference]: Finished difference Result 381 states and 548 transitions. [2024-11-02 12:36:26,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-11-02 12:36:26,852 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 [2024-11-02 12:36:26,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:26,858 INFO L225 Difference]: With dead ends: 381 [2024-11-02 12:36:26,860 INFO L226 Difference]: Without dead ends: 212 [2024-11-02 12:36:26,861 INFO L431 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 [2024-11-02 12:36:26,862 INFO L432 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 429 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 648 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 [2024-11-02 12:36:26,862 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 648 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2024-11-02 12:36:26,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2024-11-02 12:36:26,882 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 212. [2024-11-02 12:36:26,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 212 states, 162 states have (on average 1.4382716049382716) internal successors, (233), 162 states have internal predecessors, (233), 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) [2024-11-02 12:36:26,885 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 212 states to 212 states and 301 transitions. [2024-11-02 12:36:26,886 INFO L78 Accepts]: Start accepts. Automaton has 212 states and 301 transitions. Word has length 57 [2024-11-02 12:36:26,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:26,887 INFO L471 AbstractCegarLoop]: Abstraction has 212 states and 301 transitions. [2024-11-02 12:36:26,887 INFO L472 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) [2024-11-02 12:36:26,887 INFO L276 IsEmpty]: Start isEmpty. Operand 212 states and 301 transitions. [2024-11-02 12:36:26,889 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2024-11-02 12:36:26,890 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:26,890 INFO L215 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] [2024-11-02 12:36:26,890 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-11-02 12:36:26,890 INFO L396 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:26,891 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:26,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1951430269, now seen corresponding path program 1 times [2024-11-02 12:36:26,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:26,891 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873802091] [2024-11-02 12:36:26,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:26,891 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:27,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:27,773 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:36:27,774 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873802091] [2024-11-02 12:36:27,774 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [873802091] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:27,774 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403548080] [2024-11-02 12:36:27,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:27,775 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:27,775 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:27,777 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:27,790 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2024-11-02 12:36:28,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:28,073 INFO L255 TraceCheckSpWp]: Trace formula consists of 365 conjuncts, 19 conjuncts are in the unsatisfiable core [2024-11-02 12:36:28,084 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:28,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 0 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2024-11-02 12:36:28,429 INFO L307 TraceCheckSpWp]: Omiting computation of backward sequence because forward sequence was already perfect [2024-11-02 12:36:28,430 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403548080] provided 1 perfect and 0 imperfect interpolant sequences [2024-11-02 12:36:28,430 INFO L185 FreeRefinementEngine]: Found 1 perfect and 1 imperfect interpolant sequences. [2024-11-02 12:36:28,430 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [9] total 12 [2024-11-02 12:36:28,431 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1138625939] [2024-11-02 12:36:28,431 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-11-02 12:36:28,431 INFO L548 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-11-02 12:36:28,431 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2024-11-02 12:36:28,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-11-02 12:36:28,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=109, Unknown=0, NotChecked=0, Total=132 [2024-11-02 12:36:28,432 INFO L87 Difference]: Start difference. First operand 212 states and 301 transitions. Second operand has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 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) [2024-11-02 12:36:28,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2024-11-02 12:36:28,782 INFO L93 Difference]: Finished difference Result 601 states and 839 transitions. [2024-11-02 12:36:28,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-11-02 12:36:28,783 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 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 [2024-11-02 12:36:28,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2024-11-02 12:36:28,785 INFO L225 Difference]: With dead ends: 601 [2024-11-02 12:36:28,786 INFO L226 Difference]: Without dead ends: 400 [2024-11-02 12:36:28,787 INFO L431 NwaCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 58 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2024-11-02 12:36:28,788 INFO L432 NwaCegarLoop]: 220 mSDtfsCounter, 217 mSDsluCounter, 796 mSDsCounter, 0 mSdLazyCounter, 113 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 218 SdHoareTripleChecker+Valid, 1016 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 113 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2024-11-02 12:36:28,788 INFO L433 NwaCegarLoop]: SdHoareTripleChecker [218 Valid, 1016 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 113 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2024-11-02 12:36:28,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 400 states. [2024-11-02 12:36:28,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 400 to 396. [2024-11-02 12:36:28,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 396 states, 300 states have (on average 1.42) internal successors, (426), 301 states have internal predecessors, (426), 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) [2024-11-02 12:36:28,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 396 states to 396 states and 556 transitions. [2024-11-02 12:36:28,818 INFO L78 Accepts]: Start accepts. Automaton has 396 states and 556 transitions. Word has length 60 [2024-11-02 12:36:28,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2024-11-02 12:36:28,819 INFO L471 AbstractCegarLoop]: Abstraction has 396 states and 556 transitions. [2024-11-02 12:36:28,819 INFO L472 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 4 states have (on average 11.25) internal successors, (45), 6 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) [2024-11-02 12:36:28,819 INFO L276 IsEmpty]: Start isEmpty. Operand 396 states and 556 transitions. [2024-11-02 12:36:28,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2024-11-02 12:36:28,820 INFO L207 NwaCegarLoop]: Found error trace [2024-11-02 12:36:28,821 INFO L215 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] [2024-11-02 12:36:28,847 INFO L540 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2024-11-02 12:36:29,022 WARN L453 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:29,022 INFO L396 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2024-11-02 12:36:29,022 INFO L157 PredicateUnifier]: Initialized classic predicate unifier [2024-11-02 12:36:29,023 INFO L85 PathProgramCache]: Analyzing trace with hash 2028707838, now seen corresponding path program 1 times [2024-11-02 12:36:29,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2024-11-02 12:36:29,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518230580] [2024-11-02 12:36:29,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:29,024 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-11-02 12:36:29,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:29,916 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:36:29,916 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2024-11-02 12:36:29,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518230580] [2024-11-02 12:36:29,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1518230580] provided 0 perfect and 1 imperfect interpolant sequences [2024-11-02 12:36:29,917 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553895536] [2024-11-02 12:36:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-11-02 12:36:29,917 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2024-11-02 12:36:29,917 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 [2024-11-02 12:36:29,919 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2024-11-02 12:36:29,921 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_556d8475-e6c1-4500-badb-4ff0378f7e3a/bin/utaipan-verify-DbMuA5NWw2/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2024-11-02 12:36:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-11-02 12:36:30,094 INFO L255 TraceCheckSpWp]: Trace formula consists of 382 conjuncts, 13 conjuncts are in the unsatisfiable core [2024-11-02 12:36:30,098 INFO L278 TraceCheckSpWp]: Computing forward predicates... [2024-11-02 12:36:30,663 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-11-02 12:36:30,663 INFO L311 TraceCheckSpWp]: Computing backward predicates... [2024-11-02 12:36:30,856 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2024-11-02 12:36:30,857 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [553895536] provided 0 perfect and 2 imperfect interpolant sequences [2024-11-02 12:36:30,857 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [851910624] [2024-11-02 12:36:30,883 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2024-11-02 12:36:30,883 INFO L166 IcfgInterpreter]: Building call graph [2024-11-02 12:36:30,889 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2024-11-02 12:36:30,895 INFO L176 IcfgInterpreter]: Starting interpretation [2024-11-02 12:36:30,896 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2024-11-02 12:36:47,597 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 16 for LOIs [2024-11-02 12:36:47,603 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 8 for LOIs [2024-11-02 12:36:47,605 INFO L197 IcfgInterpreter]: Interpreting procedure read_side1_failed_history with input of size 80 for LOIs [2024-11-02 12:36:47,938 INFO L197 IcfgInterpreter]: Interpreting procedure assert with input of size 131 for LOIs