./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 9bd2c7ff Calling Ultimate with: /usr/lib/jvm/java-11-openjdk-amd64/bin/java -Dosgi.configuration.area=/tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ --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 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 --- Real Ultimate output --- This is Ultimate 0.2.3-dev-9bd2c7f [2023-11-19 04:10:37,160 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-19 04:10:37,263 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-19 04:10:37,275 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-19 04:10:37,276 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-19 04:10:37,308 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-19 04:10:37,309 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-19 04:10:37,309 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-19 04:10:37,310 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-19 04:10:37,311 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-19 04:10:37,312 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-19 04:10:37,312 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-19 04:10:37,313 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-19 04:10:37,314 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-19 04:10:37,314 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-19 04:10:37,315 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-19 04:10:37,315 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-19 04:10:37,316 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-19 04:10:37,317 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-19 04:10:37,317 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-19 04:10:37,318 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-19 04:10:37,319 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-19 04:10:37,320 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-19 04:10:37,321 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-19 04:10:37,321 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-19 04:10:37,322 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-19 04:10:37,323 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-19 04:10:37,323 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-19 04:10:37,324 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-19 04:10:37,324 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-19 04:10:37,325 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-19 04:10:37,326 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-19 04:10:37,326 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-19 04:10:37,327 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-19 04:10:37,327 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-19 04:10:37,328 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-19 04:10:37,328 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:10:37,329 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-19 04:10:37,329 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-19 04:10:37,330 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-19 04:10:37,330 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-19 04:10:37,330 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-19 04:10:37,331 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-19 04:10:37,336 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-19 04:10:37,337 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-19 04:10:37,337 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_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5d72e5e7abaa750c1c0009f2e3addca35915e1b949637f5a49ed633aadc3fe53 [2023-11-19 04:10:37,685 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-19 04:10:37,720 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-19 04:10:37,723 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-19 04:10:37,725 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-19 04:10:37,726 INFO L274 PluginConnector]: CDTParser initialized [2023-11-19 04:10:37,729 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/../../sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-11-19 04:10:40,948 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-19 04:10:41,404 INFO L384 CDTParser]: Found 1 translation units. [2023-11-19 04:10:41,408 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-11-19 04:10:41,435 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/data/1f5954a74/16112a79298c46d282239e80d7c27fe2/FLAG7e86bd75d [2023-11-19 04:10:41,451 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/data/1f5954a74/16112a79298c46d282239e80d7c27fe2 [2023-11-19 04:10:41,458 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-19 04:10:41,461 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-19 04:10:41,468 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-19 04:10:41,468 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-19 04:10:41,475 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-19 04:10:41,479 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:41,480 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@380a8c9a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41, skipping insertion in model container [2023-11-19 04:10:41,481 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:41,536 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-19 04:10:41,861 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2023-11-19 04:10:41,874 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:10:41,888 INFO L202 MainTranslator]: Completed pre-run [2023-11-19 04:10:41,957 WARN L240 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/sv-benchmarks/c/seq-mthreaded/pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c[14680,14693] [2023-11-19 04:10:41,958 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-19 04:10:41,978 INFO L206 MainTranslator]: Completed translation [2023-11-19 04:10:41,979 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41 WrapperNode [2023-11-19 04:10:41,979 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-19 04:10:41,981 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-19 04:10:41,981 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-19 04:10:41,981 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-19 04:10:41,990 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,018 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,081 INFO L138 Inliner]: procedures = 32, calls = 48, calls flagged for inlining = 12, calls inlined = 12, statements flattened = 497 [2023-11-19 04:10:42,082 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-19 04:10:42,083 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-19 04:10:42,083 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-19 04:10:42,083 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-19 04:10:42,095 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,095 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,102 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,102 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,120 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,137 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,141 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,145 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,169 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-19 04:10:42,170 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-19 04:10:42,170 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-19 04:10:42,170 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-19 04:10:42,171 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (1/1) ... [2023-11-19 04:10:42,186 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-19 04:10:42,199 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:42,215 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-19 04:10:42,235 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-19 04:10:42,270 INFO L130 BoogieDeclarations]: Found specification of procedure read_manual_selection_history [2023-11-19 04:10:42,271 INFO L138 BoogieDeclarations]: Found implementation of procedure read_manual_selection_history [2023-11-19 04:10:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-19 04:10:42,271 INFO L130 BoogieDeclarations]: Found specification of procedure read_side2_failed_history [2023-11-19 04:10:42,272 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side2_failed_history [2023-11-19 04:10:42,272 INFO L130 BoogieDeclarations]: Found specification of procedure assert [2023-11-19 04:10:42,274 INFO L138 BoogieDeclarations]: Found implementation of procedure assert [2023-11-19 04:10:42,275 INFO L130 BoogieDeclarations]: Found specification of procedure flip_the_side [2023-11-19 04:10:42,276 INFO L138 BoogieDeclarations]: Found implementation of procedure flip_the_side [2023-11-19 04:10:42,276 INFO L130 BoogieDeclarations]: Found specification of procedure assume_abort_if_not [2023-11-19 04:10:42,276 INFO L138 BoogieDeclarations]: Found implementation of procedure assume_abort_if_not [2023-11-19 04:10:42,276 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-19 04:10:42,277 INFO L130 BoogieDeclarations]: Found specification of procedure read_side1_failed_history [2023-11-19 04:10:42,277 INFO L138 BoogieDeclarations]: Found implementation of procedure read_side1_failed_history [2023-11-19 04:10:42,277 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-19 04:10:42,277 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-19 04:10:42,278 INFO L130 BoogieDeclarations]: Found specification of procedure read_active_side_history [2023-11-19 04:10:42,278 INFO L138 BoogieDeclarations]: Found implementation of procedure read_active_side_history [2023-11-19 04:10:42,481 INFO L236 CfgBuilder]: Building ICFG [2023-11-19 04:10:42,485 INFO L262 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-19 04:10:43,215 INFO L277 CfgBuilder]: Performing block encoding [2023-11-19 04:10:43,481 INFO L297 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-19 04:10:43,481 INFO L302 CfgBuilder]: Removed 1 assume(true) statements. [2023-11-19 04:10:43,489 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:10:43 BoogieIcfgContainer [2023-11-19 04:10:43,489 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-19 04:10:43,492 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-19 04:10:43,492 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-19 04:10:43,496 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-19 04:10:43,496 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 19.11 04:10:41" (1/3) ... [2023-11-19 04:10:43,497 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609c7699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:10:43, skipping insertion in model container [2023-11-19 04:10:43,497 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 19.11 04:10:41" (2/3) ... [2023-11-19 04:10:43,499 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@609c7699 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 19.11 04:10:43, skipping insertion in model container [2023-11-19 04:10:43,500 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 19.11 04:10:43" (3/3) ... [2023-11-19 04:10:43,501 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_STARTPALS_ActiveStandby.ufo.UNBOUNDED.pals.c [2023-11-19 04:10:43,525 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-19 04:10:43,526 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-19 04:10:43,609 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-19 04:10:43,619 INFO L357 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mAutomataTypeConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopHeads, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mPorIndependenceSettings=[Lde.uni_freiburg.informatik.ultimate.lib.tracecheckerutils.partialorder.independence.IndependenceSettings;@184018d0, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-19 04:10:43,620 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-19 04:10:43,628 INFO L276 IsEmpty]: Start isEmpty. Operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:10:43,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2023-11-19 04:10:43,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:43,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:43,641 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:43,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:43,648 INFO L85 PathProgramCache]: Analyzing trace with hash 940025637, now seen corresponding path program 1 times [2023-11-19 04:10:43,660 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:43,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506620063] [2023-11-19 04:10:43,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:43,662 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:43,953 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:44,482 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:10:44,483 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:44,483 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506620063] [2023-11-19 04:10:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506620063] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:44,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:44,485 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:44,487 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085805043] [2023-11-19 04:10:44,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:44,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:44,494 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:44,547 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:44,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:44,553 INFO L87 Difference]: Start difference. First operand has 149 states, 109 states have (on average 1.5412844036697249) internal successors, (168), 111 states have internal predecessors, (168), 31 states have call successors, (31), 7 states have call predecessors, (31), 7 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) Second operand has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:10:44,821 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:44,821 INFO L93 Difference]: Finished difference Result 298 states and 487 transitions. [2023-11-19 04:10:44,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:44,824 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) Word has length 19 [2023-11-19 04:10:44,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:44,839 INFO L225 Difference]: With dead ends: 298 [2023-11-19 04:10:44,840 INFO L226 Difference]: Without dead ends: 152 [2023-11-19 04:10:44,851 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:44,856 INFO L413 NwaCegarLoop]: 215 mSDtfsCounter, 5 mSDsluCounter, 420 mSDsCounter, 0 mSdLazyCounter, 45 mSolverCounterSat, 3 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 635 SdHoareTripleChecker+Invalid, 48 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 3 IncrementalHoareTripleChecker+Valid, 45 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:44,858 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 635 Invalid, 48 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [3 Valid, 45 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:10:44,879 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 152 states. [2023-11-19 04:10:44,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 152 to 152. [2023-11-19 04:10:44,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 152 states, 112 states have (on average 1.5089285714285714) internal successors, (169), 113 states have internal predecessors, (169), 31 states have call successors, (31), 8 states have call predecessors, (31), 8 states have return successors, (31), 31 states have call predecessors, (31), 31 states have call successors, (31) [2023-11-19 04:10:44,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 231 transitions. [2023-11-19 04:10:44,924 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 231 transitions. Word has length 19 [2023-11-19 04:10:44,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:44,925 INFO L495 AbstractCegarLoop]: Abstraction has 152 states and 231 transitions. [2023-11-19 04:10:44,925 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 3.75) internal successors, (15), 3 states have internal predecessors, (15), 2 states have call successors, (3), 3 states have call predecessors, (3), 1 states have return successors, (1), 1 states have call predecessors, (1), 1 states have call successors, (1) [2023-11-19 04:10:44,926 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 231 transitions. [2023-11-19 04:10:44,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 31 [2023-11-19 04:10:44,928 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:44,928 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:44,929 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-19 04:10:44,929 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:44,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:44,930 INFO L85 PathProgramCache]: Analyzing trace with hash -1579928659, now seen corresponding path program 1 times [2023-11-19 04:10:44,930 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:44,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [503848867] [2023-11-19 04:10:44,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:44,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:44,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:45,101 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:45,101 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:45,102 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [503848867] [2023-11-19 04:10:45,102 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [503848867] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:45,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:45,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:10:45,103 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67066945] [2023-11-19 04:10:45,103 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:45,104 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:10:45,105 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:45,106 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:10:45,106 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:45,106 INFO L87 Difference]: Start difference. First operand 152 states and 231 transitions. Second operand has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:10:45,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:45,371 INFO L93 Difference]: Finished difference Result 337 states and 512 transitions. [2023-11-19 04:10:45,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:10:45,372 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 30 [2023-11-19 04:10:45,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:45,376 INFO L225 Difference]: With dead ends: 337 [2023-11-19 04:10:45,376 INFO L226 Difference]: Without dead ends: 188 [2023-11-19 04:10:45,377 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:10:45,379 INFO L413 NwaCegarLoop]: 193 mSDtfsCounter, 325 mSDsluCounter, 379 mSDsCounter, 0 mSdLazyCounter, 101 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 325 SdHoareTripleChecker+Valid, 572 SdHoareTripleChecker+Invalid, 115 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 101 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:45,380 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [325 Valid, 572 Invalid, 115 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 101 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:10:45,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-19 04:10:45,407 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-19 04:10:45,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.5106382978723405) internal successors, (213), 141 states have internal predecessors, (213), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:45,415 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 281 transitions. [2023-11-19 04:10:45,416 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 281 transitions. Word has length 30 [2023-11-19 04:10:45,417 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:45,417 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 281 transitions. [2023-11-19 04:10:45,417 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.2) internal successors, (21), 5 states have internal predecessors, (21), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:10:45,418 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 281 transitions. [2023-11-19 04:10:45,421 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 32 [2023-11-19 04:10:45,421 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:45,422 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:45,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-19 04:10:45,422 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:45,429 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:45,434 INFO L85 PathProgramCache]: Analyzing trace with hash 2031615976, now seen corresponding path program 1 times [2023-11-19 04:10:45,435 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:45,435 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816568523] [2023-11-19 04:10:45,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:45,436 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:45,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:45,600 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:45,600 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:45,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816568523] [2023-11-19 04:10:45,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816568523] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:45,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:45,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2023-11-19 04:10:45,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881200130] [2023-11-19 04:10:45,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:45,603 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-19 04:10:45,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:45,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-19 04:10:45,605 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:45,605 INFO L87 Difference]: Start difference. First operand 186 states and 281 transitions. Second operand has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:10:45,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:45,869 INFO L93 Difference]: Finished difference Result 337 states and 510 transitions. [2023-11-19 04:10:45,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-19 04:10:45,870 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) Word has length 31 [2023-11-19 04:10:45,879 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:45,882 INFO L225 Difference]: With dead ends: 337 [2023-11-19 04:10:45,882 INFO L226 Difference]: Without dead ends: 188 [2023-11-19 04:10:45,888 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 3 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-19 04:10:45,890 INFO L413 NwaCegarLoop]: 194 mSDtfsCounter, 321 mSDsluCounter, 381 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 321 SdHoareTripleChecker+Valid, 575 SdHoareTripleChecker+Invalid, 111 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:45,893 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [321 Valid, 575 Invalid, 111 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-19 04:10:45,897 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 188 states. [2023-11-19 04:10:45,944 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 188 to 186. [2023-11-19 04:10:45,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 186 states, 141 states have (on average 1.50354609929078) internal successors, (212), 141 states have internal predecessors, (212), 34 states have call successors, (34), 10 states have call predecessors, (34), 10 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:45,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 186 states to 186 states and 280 transitions. [2023-11-19 04:10:45,951 INFO L78 Accepts]: Start accepts. Automaton has 186 states and 280 transitions. Word has length 31 [2023-11-19 04:10:45,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:45,952 INFO L495 AbstractCegarLoop]: Abstraction has 186 states and 280 transitions. [2023-11-19 04:10:45,952 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 4.4) internal successors, (22), 5 states have internal predecessors, (22), 3 states have call successors, (5), 2 states have call predecessors, (5), 1 states have return successors, (3), 3 states have call predecessors, (3), 3 states have call successors, (3) [2023-11-19 04:10:45,952 INFO L276 IsEmpty]: Start isEmpty. Operand 186 states and 280 transitions. [2023-11-19 04:10:45,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 34 [2023-11-19 04:10:45,957 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:45,958 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:45,959 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-19 04:10:45,959 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:45,960 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:45,960 INFO L85 PathProgramCache]: Analyzing trace with hash 221392883, now seen corresponding path program 1 times [2023-11-19 04:10:45,960 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:45,960 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [491426114] [2023-11-19 04:10:45,961 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:45,961 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:46,012 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:46,240 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:46,240 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:46,241 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [491426114] [2023-11-19 04:10:46,241 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [491426114] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:46,241 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:46,241 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:46,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1398132349] [2023-11-19 04:10:46,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:46,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:46,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:46,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:46,244 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:46,244 INFO L87 Difference]: Start difference. First operand 186 states and 280 transitions. Second operand has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 04:10:46,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:46,334 INFO L93 Difference]: Finished difference Result 340 states and 514 transitions. [2023-11-19 04:10:46,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:46,335 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) Word has length 33 [2023-11-19 04:10:46,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:46,339 INFO L225 Difference]: With dead ends: 340 [2023-11-19 04:10:46,339 INFO L226 Difference]: Without dead ends: 191 [2023-11-19 04:10:46,340 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:46,342 INFO L413 NwaCegarLoop]: 217 mSDtfsCounter, 6 mSDsluCounter, 430 mSDsCounter, 0 mSdLazyCounter, 36 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 647 SdHoareTripleChecker+Invalid, 37 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 36 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:46,343 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 647 Invalid, 37 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 36 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:10:46,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2023-11-19 04:10:46,367 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 191. [2023-11-19 04:10:46,368 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 191 states, 145 states have (on average 1.4896551724137932) internal successors, (216), 145 states have internal predecessors, (216), 34 states have call successors, (34), 11 states have call predecessors, (34), 11 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:46,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 191 states to 191 states and 284 transitions. [2023-11-19 04:10:46,371 INFO L78 Accepts]: Start accepts. Automaton has 191 states and 284 transitions. Word has length 33 [2023-11-19 04:10:46,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:46,372 INFO L495 AbstractCegarLoop]: Abstraction has 191 states and 284 transitions. [2023-11-19 04:10:46,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 6.0) internal successors, (24), 3 states have internal predecessors, (24), 2 states have call successors, (5), 3 states have call predecessors, (5), 1 states have return successors, (3), 1 states have call predecessors, (3), 1 states have call successors, (3) [2023-11-19 04:10:46,372 INFO L276 IsEmpty]: Start isEmpty. Operand 191 states and 284 transitions. [2023-11-19 04:10:46,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 42 [2023-11-19 04:10:46,375 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:46,375 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:46,375 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-19 04:10:46,376 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:46,376 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:46,376 INFO L85 PathProgramCache]: Analyzing trace with hash 611086105, now seen corresponding path program 1 times [2023-11-19 04:10:46,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:46,377 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098493160] [2023-11-19 04:10:46,377 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:46,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:46,417 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:46,699 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:46,700 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:46,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098493160] [2023-11-19 04:10:46,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2098493160] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:46,701 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:46,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:46,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1993182772] [2023-11-19 04:10:46,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:46,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:46,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:46,705 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:46,705 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:46,706 INFO L87 Difference]: Start difference. First operand 191 states and 284 transitions. Second operand has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:10:46,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:46,816 INFO L93 Difference]: Finished difference Result 350 states and 525 transitions. [2023-11-19 04:10:46,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:46,818 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) Word has length 41 [2023-11-19 04:10:46,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:46,823 INFO L225 Difference]: With dead ends: 350 [2023-11-19 04:10:46,823 INFO L226 Difference]: Without dead ends: 196 [2023-11-19 04:10:46,825 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:46,829 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:46,829 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:10:46,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2023-11-19 04:10:46,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 196. [2023-11-19 04:10:46,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 196 states, 149 states have (on average 1.476510067114094) internal successors, (220), 149 states have internal predecessors, (220), 34 states have call successors, (34), 12 states have call predecessors, (34), 12 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:46,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 196 states to 196 states and 288 transitions. [2023-11-19 04:10:46,856 INFO L78 Accepts]: Start accepts. Automaton has 196 states and 288 transitions. Word has length 41 [2023-11-19 04:10:46,858 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:46,858 INFO L495 AbstractCegarLoop]: Abstraction has 196 states and 288 transitions. [2023-11-19 04:10:46,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 7.5) internal successors, (30), 3 states have internal predecessors, (30), 2 states have call successors, (6), 3 states have call predecessors, (6), 1 states have return successors, (4), 1 states have call predecessors, (4), 1 states have call successors, (4) [2023-11-19 04:10:46,859 INFO L276 IsEmpty]: Start isEmpty. Operand 196 states and 288 transitions. [2023-11-19 04:10:46,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:10:46,867 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:46,868 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:46,868 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-19 04:10:46,868 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:46,869 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:46,869 INFO L85 PathProgramCache]: Analyzing trace with hash 36466403, now seen corresponding path program 1 times [2023-11-19 04:10:46,869 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:46,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060376466] [2023-11-19 04:10:46,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:46,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:46,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:47,092 INFO L134 CoverageAnalysis]: Checked inductivity of 5 backedges. 3 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:47,093 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:47,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060376466] [2023-11-19 04:10:47,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1060376466] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:47,098 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:47,099 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:47,099 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272115707] [2023-11-19 04:10:47,099 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:47,100 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:47,100 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:47,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:47,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:47,103 INFO L87 Difference]: Start difference. First operand 196 states and 288 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:10:47,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:47,180 INFO L93 Difference]: Finished difference Result 359 states and 529 transitions. [2023-11-19 04:10:47,181 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:47,181 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-19 04:10:47,182 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:47,184 INFO L225 Difference]: With dead ends: 359 [2023-11-19 04:10:47,184 INFO L226 Difference]: Without dead ends: 200 [2023-11-19 04:10:47,185 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:47,188 INFO L413 NwaCegarLoop]: 219 mSDtfsCounter, 5 mSDsluCounter, 423 mSDsCounter, 0 mSdLazyCounter, 42 mSolverCounterSat, 1 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 5 SdHoareTripleChecker+Valid, 642 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 1 IncrementalHoareTripleChecker+Valid, 42 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:47,191 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [5 Valid, 642 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [1 Valid, 42 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:10:47,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2023-11-19 04:10:47,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 200. [2023-11-19 04:10:47,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 200 states, 152 states have (on average 1.4671052631578947) internal successors, (223), 152 states have internal predecessors, (223), 34 states have call successors, (34), 13 states have call predecessors, (34), 13 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:47,218 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 200 states to 200 states and 291 transitions. [2023-11-19 04:10:47,219 INFO L78 Accepts]: Start accepts. Automaton has 200 states and 291 transitions. Word has length 49 [2023-11-19 04:10:47,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:47,220 INFO L495 AbstractCegarLoop]: Abstraction has 200 states and 291 transitions. [2023-11-19 04:10:47,221 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:10:47,221 INFO L276 IsEmpty]: Start isEmpty. Operand 200 states and 291 transitions. [2023-11-19 04:10:47,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 50 [2023-11-19 04:10:47,223 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:47,223 INFO L195 NwaCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:47,224 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-19 04:10:47,224 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:47,224 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:47,225 INFO L85 PathProgramCache]: Analyzing trace with hash -1862041590, now seen corresponding path program 1 times [2023-11-19 04:10:47,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:47,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484307810] [2023-11-19 04:10:47,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:47,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:47,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:47,459 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 2 trivial. 0 not checked. [2023-11-19 04:10:47,459 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:47,459 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484307810] [2023-11-19 04:10:47,460 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1484307810] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:47,460 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:47,460 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:47,460 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141741628] [2023-11-19 04:10:47,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:47,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:47,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:47,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:47,463 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:47,463 INFO L87 Difference]: Start difference. First operand 200 states and 291 transitions. Second operand has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:10:47,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:47,558 INFO L93 Difference]: Finished difference Result 368 states and 539 transitions. [2023-11-19 04:10:47,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:47,559 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) Word has length 49 [2023-11-19 04:10:47,559 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:47,562 INFO L225 Difference]: With dead ends: 368 [2023-11-19 04:10:47,562 INFO L226 Difference]: Without dead ends: 205 [2023-11-19 04:10:47,563 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:47,567 INFO L413 NwaCegarLoop]: 214 mSDtfsCounter, 6 mSDsluCounter, 419 mSDsCounter, 0 mSdLazyCounter, 47 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 6 SdHoareTripleChecker+Valid, 633 SdHoareTripleChecker+Invalid, 51 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 47 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.1s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:47,567 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [6 Valid, 633 Invalid, 51 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 47 Invalid, 0 Unknown, 0 Unchecked, 0.1s Time] [2023-11-19 04:10:47,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2023-11-19 04:10:47,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 205. [2023-11-19 04:10:47,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 205 states, 156 states have (on average 1.455128205128205) internal successors, (227), 156 states have internal predecessors, (227), 34 states have call successors, (34), 14 states have call predecessors, (34), 14 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:47,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 205 states to 205 states and 295 transitions. [2023-11-19 04:10:47,592 INFO L78 Accepts]: Start accepts. Automaton has 205 states and 295 transitions. Word has length 49 [2023-11-19 04:10:47,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:47,595 INFO L495 AbstractCegarLoop]: Abstraction has 205 states and 295 transitions. [2023-11-19 04:10:47,595 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.0) internal successors, (36), 3 states have internal predecessors, (36), 2 states have call successors, (7), 3 states have call predecessors, (7), 1 states have return successors, (5), 1 states have call predecessors, (5), 1 states have call successors, (5) [2023-11-19 04:10:47,595 INFO L276 IsEmpty]: Start isEmpty. Operand 205 states and 295 transitions. [2023-11-19 04:10:47,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 58 [2023-11-19 04:10:47,599 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:47,599 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:47,599 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-19 04:10:47,599 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:47,600 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:47,600 INFO L85 PathProgramCache]: Analyzing trace with hash 2131134058, now seen corresponding path program 1 times [2023-11-19 04:10:47,600 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:47,601 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276988413] [2023-11-19 04:10:47,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:47,601 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:47,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:47,837 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 2 proven. 0 refuted. 0 times theorem prover too weak. 7 trivial. 0 not checked. [2023-11-19 04:10:47,837 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:47,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276988413] [2023-11-19 04:10:47,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [276988413] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:10:47,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-19 04:10:47,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-19 04:10:47,838 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421814559] [2023-11-19 04:10:47,838 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:10:47,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2023-11-19 04:10:47,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:10:47,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2023-11-19 04:10:47,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2023-11-19 04:10:47,840 INFO L87 Difference]: Start difference. First operand 205 states and 295 transitions. Second operand has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:10:47,917 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:10:47,917 INFO L93 Difference]: Finished difference Result 379 states and 546 transitions. [2023-11-19 04:10:47,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2023-11-19 04:10:47,918 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) Word has length 57 [2023-11-19 04:10:47,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:10:47,921 INFO L225 Difference]: With dead ends: 379 [2023-11-19 04:10:47,921 INFO L226 Difference]: Without dead ends: 211 [2023-11-19 04:10:47,922 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2023-11-19 04:10:47,923 INFO L413 NwaCegarLoop]: 218 mSDtfsCounter, 7 mSDsluCounter, 426 mSDsCounter, 0 mSdLazyCounter, 41 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 7 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 43 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 41 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-19 04:10:47,923 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [7 Valid, 644 Invalid, 43 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 41 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-19 04:10:47,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 211 states. [2023-11-19 04:10:47,937 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 211 to 211. [2023-11-19 04:10:47,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 211 states, 161 states have (on average 1.4409937888198758) internal successors, (232), 161 states have internal predecessors, (232), 34 states have call successors, (34), 15 states have call predecessors, (34), 15 states have return successors, (34), 34 states have call predecessors, (34), 34 states have call successors, (34) [2023-11-19 04:10:47,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 211 states to 211 states and 300 transitions. [2023-11-19 04:10:47,940 INFO L78 Accepts]: Start accepts. Automaton has 211 states and 300 transitions. Word has length 57 [2023-11-19 04:10:47,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:10:47,941 INFO L495 AbstractCegarLoop]: Abstraction has 211 states and 300 transitions. [2023-11-19 04:10:47,941 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 9.5) internal successors, (38), 3 states have internal predecessors, (38), 2 states have call successors, (8), 3 states have call predecessors, (8), 1 states have return successors, (6), 1 states have call predecessors, (6), 1 states have call successors, (6) [2023-11-19 04:10:47,941 INFO L276 IsEmpty]: Start isEmpty. Operand 211 states and 300 transitions. [2023-11-19 04:10:47,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-19 04:10:47,942 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:10:47,942 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:10:47,943 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-19 04:10:47,943 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:10:47,943 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:10:47,943 INFO L85 PathProgramCache]: Analyzing trace with hash -180629249, now seen corresponding path program 1 times [2023-11-19 04:10:47,944 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:10:47,944 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031116457] [2023-11-19 04:10:47,944 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:47,944 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:10:48,020 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:48,502 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:10:48,502 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:10:48,502 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031116457] [2023-11-19 04:10:48,502 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1031116457] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:10:48,503 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253056387] [2023-11-19 04:10:48,503 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:10:48,503 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:10:48,503 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:10:48,511 INFO L229 MonitoredProcess]: Starting monitored process 2 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:10:48,543 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2023-11-19 04:10:48,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:10:48,708 INFO L262 TraceCheckSpWp]: Trace formula consists of 354 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 04:10:48,718 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:10:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:10:49,503 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:10:49,713 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:10:49,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1253056387] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:10:49,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1099623075] [2023-11-19 04:10:49,743 INFO L159 IcfgInterpreter]: Started Sifa with 55 locations of interest [2023-11-19 04:10:49,743 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:10:49,747 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:10:49,754 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:10:49,754 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:10:59,424 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 139 for LOIs [2023-11-19 04:10:59,714 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 114 for LOIs [2023-11-19 04:10:59,740 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 101 for LOIs [2023-11-19 04:10:59,869 INFO L180 IcfgInterpreter]: Interpretation finished [2023-11-19 04:11:08,743 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSifa [1099623075] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-19 04:11:08,744 INFO L185 FreeRefinementEngine]: Found 1 perfect and 3 imperfect interpolant sequences. [2023-11-19 04:11:08,744 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [9, 9, 9] total 41 [2023-11-19 04:11:08,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [812611606] [2023-11-19 04:11:08,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-19 04:11:08,746 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-19 04:11:08,746 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-19 04:11:08,747 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-19 04:11:08,748 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=185, Invalid=1455, Unknown=0, NotChecked=0, Total=1640 [2023-11-19 04:11:08,748 INFO L87 Difference]: Start difference. First operand 211 states and 300 transitions. Second operand has 25 states, 20 states have (on average 2.05) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:11:14,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-19 04:11:14,618 INFO L93 Difference]: Finished difference Result 537 states and 749 transitions. [2023-11-19 04:11:14,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2023-11-19 04:11:14,619 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 20 states have (on average 2.05) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) Word has length 60 [2023-11-19 04:11:14,620 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-19 04:11:14,624 INFO L225 Difference]: With dead ends: 537 [2023-11-19 04:11:14,624 INFO L226 Difference]: Without dead ends: 363 [2023-11-19 04:11:14,626 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 191 GetRequests, 148 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=222, Invalid=1758, Unknown=0, NotChecked=0, Total=1980 [2023-11-19 04:11:14,629 INFO L413 NwaCegarLoop]: 315 mSDtfsCounter, 256 mSDsluCounter, 2693 mSDsCounter, 0 mSdLazyCounter, 1775 mSolverCounterSat, 45 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 3.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 278 SdHoareTripleChecker+Valid, 3008 SdHoareTripleChecker+Invalid, 1820 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.1s SdHoareTripleChecker+Time, 45 IncrementalHoareTripleChecker+Valid, 1775 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 3.9s IncrementalHoareTripleChecker+Time [2023-11-19 04:11:14,629 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [278 Valid, 3008 Invalid, 1820 Unknown, 0 Unchecked, 0.1s Time], IncrementalHoareTripleChecker [45 Valid, 1775 Invalid, 0 Unknown, 0 Unchecked, 3.9s Time] [2023-11-19 04:11:14,632 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 363 states. [2023-11-19 04:11:14,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 363 to 360. [2023-11-19 04:11:14,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 360 states, 269 states have (on average 1.379182156133829) internal successors, (371), 270 states have internal predecessors, (371), 62 states have call successors, (62), 28 states have call predecessors, (62), 28 states have return successors, (62), 61 states have call predecessors, (62), 62 states have call successors, (62) [2023-11-19 04:11:14,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 360 states to 360 states and 495 transitions. [2023-11-19 04:11:14,716 INFO L78 Accepts]: Start accepts. Automaton has 360 states and 495 transitions. Word has length 60 [2023-11-19 04:11:14,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-19 04:11:14,716 INFO L495 AbstractCegarLoop]: Abstraction has 360 states and 495 transitions. [2023-11-19 04:11:14,717 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 25 states, 20 states have (on average 2.05) internal successors, (41), 17 states have internal predecessors, (41), 5 states have call successors, (8), 4 states have call predecessors, (8), 4 states have return successors, (7), 5 states have call predecessors, (7), 5 states have call successors, (7) [2023-11-19 04:11:14,717 INFO L276 IsEmpty]: Start isEmpty. Operand 360 states and 495 transitions. [2023-11-19 04:11:14,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 63 [2023-11-19 04:11:14,718 INFO L187 NwaCegarLoop]: Found error trace [2023-11-19 04:11:14,719 INFO L195 NwaCegarLoop]: trace histogram [2, 2, 2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-19 04:11:14,745 INFO L552 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Ended with exit code 0 [2023-11-19 04:11:14,945 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,2 /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:14,946 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting assertErr0ASSERT_VIOLATIONERROR_FUNCTION === [assertErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-19 04:11:14,946 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-19 04:11:14,946 INFO L85 PathProgramCache]: Analyzing trace with hash 361908346, now seen corresponding path program 1 times [2023-11-19 04:11:14,946 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-19 04:11:14,946 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [126368821] [2023-11-19 04:11:14,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:14,947 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-19 04:11:15,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:15,533 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:11:15,533 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-19 04:11:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [126368821] [2023-11-19 04:11:15,534 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [126368821] provided 0 perfect and 1 imperfect interpolant sequences [2023-11-19 04:11:15,534 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616047974] [2023-11-19 04:11:15,534 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-19 04:11:15,535 INFO L173 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2023-11-19 04:11:15,535 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 [2023-11-19 04:11:15,536 INFO L229 MonitoredProcess]: Starting monitored process 3 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2023-11-19 04:11:15,587 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_22572d20-80f2-43a5-87dc-ec28bfb41d3b/bin/utaipan-verify-t7M7D8N6sZ/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2023-11-19 04:11:15,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-19 04:11:15,729 INFO L262 TraceCheckSpWp]: Trace formula consists of 371 conjuncts, 17 conjunts are in the unsatisfiable core [2023-11-19 04:11:15,734 INFO L285 TraceCheckSpWp]: Computing forward predicates... [2023-11-19 04:11:16,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 5 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-19 04:11:16,206 INFO L327 TraceCheckSpWp]: Computing backward predicates... [2023-11-19 04:11:16,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 5 trivial. 0 not checked. [2023-11-19 04:11:16,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleZ3 [616047974] provided 0 perfect and 2 imperfect interpolant sequences [2023-11-19 04:11:16,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSifa [1240492428] [2023-11-19 04:11:16,372 INFO L159 IcfgInterpreter]: Started Sifa with 57 locations of interest [2023-11-19 04:11:16,373 INFO L166 IcfgInterpreter]: Building call graph [2023-11-19 04:11:16,373 INFO L171 IcfgInterpreter]: Initial procedures are [ULTIMATE.start] [2023-11-19 04:11:16,373 INFO L176 IcfgInterpreter]: Starting interpretation [2023-11-19 04:11:16,374 INFO L197 IcfgInterpreter]: Interpreting procedure ULTIMATE.start with input of size 1 for LOIs [2023-11-19 04:11:22,763 INFO L197 IcfgInterpreter]: Interpreting procedure read_active_side_history with input of size 132 for LOIs [2023-11-19 04:11:23,011 INFO L197 IcfgInterpreter]: Interpreting procedure assume_abort_if_not with input of size 108 for LOIs [2023-11-19 04:11:23,027 INFO L197 IcfgInterpreter]: Interpreting procedure read_manual_selection_history with input of size 97 for LOIs [2023-11-19 04:11:23,150 INFO L180 IcfgInterpreter]: Interpretation finished