./Ultimate.py --spec ../../sv-benchmarks/c/properties/unreach-call.prp --file ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 30e01a73 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_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/data/config -Xmx15G -Xms4m -jar /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/data -tc /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/config/TaipanReach.xml -i ../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c -s /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire --witnessprinter.witness.filename witness --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Taipan --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 5aad5fd4611705ad6fdf71db638f2162c13b3da201193a54a746a0dc7cc3072f --- Real Ultimate output --- This is Ultimate 0.2.3-dev-30e01a7 [2023-11-23 20:34:52,014 INFO L188 SettingsManager]: Resetting all preferences to default values... [2023-11-23 20:34:52,090 INFO L114 SettingsManager]: Loading settings from /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/config/svcomp-Reach-32bit-Taipan_Default.epf [2023-11-23 20:34:52,095 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2023-11-23 20:34:52,096 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2023-11-23 20:34:52,125 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2023-11-23 20:34:52,126 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2023-11-23 20:34:52,126 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2023-11-23 20:34:52,128 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2023-11-23 20:34:52,128 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2023-11-23 20:34:52,129 INFO L153 SettingsManager]: * User list type=DISABLED [2023-11-23 20:34:52,130 INFO L151 SettingsManager]: Preferences of Abstract Interpretation differ from their defaults: [2023-11-23 20:34:52,131 INFO L153 SettingsManager]: * Explicit value domain=true [2023-11-23 20:34:52,131 INFO L153 SettingsManager]: * Abstract domain for RCFG-of-the-future=PoormanAbstractDomain [2023-11-23 20:34:52,132 INFO L153 SettingsManager]: * Octagon Domain=false [2023-11-23 20:34:52,133 INFO L153 SettingsManager]: * Abstract domain=CompoundDomain [2023-11-23 20:34:52,134 INFO L153 SettingsManager]: * Check feasibility of abstract posts with an SMT solver=true [2023-11-23 20:34:52,134 INFO L153 SettingsManager]: * Use the RCFG-of-the-future interface=true [2023-11-23 20:34:52,135 INFO L153 SettingsManager]: * Interval Domain=false [2023-11-23 20:34:52,136 INFO L151 SettingsManager]: Preferences of Sifa differ from their defaults: [2023-11-23 20:34:52,137 INFO L153 SettingsManager]: * Call Summarizer=TopInputCallSummarizer [2023-11-23 20:34:52,138 INFO L153 SettingsManager]: * Simplification Technique=POLY_PAC [2023-11-23 20:34:52,139 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2023-11-23 20:34:52,140 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2023-11-23 20:34:52,140 INFO L153 SettingsManager]: * sizeof long=4 [2023-11-23 20:34:52,141 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2023-11-23 20:34:52,142 INFO L153 SettingsManager]: * sizeof POINTER=4 [2023-11-23 20:34:52,142 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2023-11-23 20:34:52,143 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2023-11-23 20:34:52,144 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2023-11-23 20:34:52,144 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2023-11-23 20:34:52,145 INFO L153 SettingsManager]: * sizeof long double=12 [2023-11-23 20:34:52,145 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2023-11-23 20:34:52,146 INFO L153 SettingsManager]: * Use constant arrays=true [2023-11-23 20:34:52,146 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2023-11-23 20:34:52,147 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2023-11-23 20:34:52,147 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2023-11-23 20:34:52,148 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:52,148 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2023-11-23 20:34:52,148 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2023-11-23 20:34:52,149 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2023-11-23 20:34:52,149 INFO L153 SettingsManager]: * Trace refinement strategy=SIFA_TAIPAN [2023-11-23 20:34:52,150 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2023-11-23 20:34:52,150 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2023-11-23 20:34:52,151 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2023-11-23 20:34:52,151 INFO L153 SettingsManager]: * Trace refinement exception blacklist=NONE [2023-11-23 20:34:52,151 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2023-11-23 20:34:52,152 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_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Taipan Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 5aad5fd4611705ad6fdf71db638f2162c13b3da201193a54a746a0dc7cc3072f [2023-11-23 20:34:52,493 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2023-11-23 20:34:52,531 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2023-11-23 20:34:52,534 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2023-11-23 20:34:52,537 INFO L270 PluginConnector]: Initializing CDTParser... [2023-11-23 20:34:52,539 INFO L274 PluginConnector]: CDTParser initialized [2023-11-23 20:34:52,540 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/../../sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-23 20:34:56,105 INFO L533 CDTParser]: Created temporary CDT project at NULL [2023-11-23 20:34:56,494 INFO L384 CDTParser]: Found 1 translation units. [2023-11-23 20:34:56,495 INFO L180 CDTParser]: Scanning /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-23 20:34:56,511 INFO L427 CDTParser]: About to delete temporary CDT project at /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/data/8bfaa678e/85f8c8cd80c44c2a80e26bc711f3e4ad/FLAG25225434f [2023-11-23 20:34:56,533 INFO L435 CDTParser]: Successfully deleted /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/data/8bfaa678e/85f8c8cd80c44c2a80e26bc711f3e4ad [2023-11-23 20:34:56,542 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2023-11-23 20:34:56,545 INFO L133 ToolchainWalker]: Walking toolchain with 6 elements. [2023-11-23 20:34:56,549 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:56,550 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2023-11-23 20:34:56,557 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2023-11-23 20:34:56,558 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:56" (1/1) ... [2023-11-23 20:34:56,560 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5c9904f0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:56, skipping insertion in model container [2023-11-23 20:34:56,560 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 23.11 08:34:56" (1/1) ... [2023-11-23 20:34:56,646 INFO L177 MainTranslator]: Built tables and reachable declarations [2023-11-23 20:34:57,076 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_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2023-11-23 20:34:57,227 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:57,253 INFO L202 MainTranslator]: Completed pre-run [2023-11-23 20:34:57,359 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_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/sv-benchmarks/c/seq-mthreaded-reduced/pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c[7251,7264] [2023-11-23 20:34:57,430 INFO L209 PostProcessor]: Analyzing one entry point: main [2023-11-23 20:34:57,464 INFO L206 MainTranslator]: Completed translation [2023-11-23 20:34:57,464 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57 WrapperNode [2023-11-23 20:34:57,465 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2023-11-23 20:34:57,466 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:57,466 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2023-11-23 20:34:57,467 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2023-11-23 20:34:57,476 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,492 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,554 INFO L138 Inliner]: procedures = 23, calls = 7, calls flagged for inlining = 2, calls inlined = 2, statements flattened = 728 [2023-11-23 20:34:57,555 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2023-11-23 20:34:57,556 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2023-11-23 20:34:57,556 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2023-11-23 20:34:57,557 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2023-11-23 20:34:57,570 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,570 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,576 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,576 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,593 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,601 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,604 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,609 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,615 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2023-11-23 20:34:57,616 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2023-11-23 20:34:57,616 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2023-11-23 20:34:57,617 INFO L274 PluginConnector]: RCFGBuilder initialized [2023-11-23 20:34:57,618 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (1/1) ... [2023-11-23 20:34:57,632 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2023-11-23 20:34:57,652 INFO L189 MonitoredProcess]: No working directory specified, using /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/z3 [2023-11-23 20:34:57,670 INFO L229 MonitoredProcess]: Starting monitored process 1 with /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2023-11-23 20:34:57,712 INFO L327 MonitoredProcess]: [MP /tmp/vcloud_worker_vcloud-master_on_vcloud-master/run_dir_f66b8069-c9ff-4e4a-a28d-85e6c33f35b0/bin/utaipan-verify-mE87zJ7Ire/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2023-11-23 20:34:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2023-11-23 20:34:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2023-11-23 20:34:57,736 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2023-11-23 20:34:57,737 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2023-11-23 20:34:57,901 INFO L241 CfgBuilder]: Building ICFG [2023-11-23 20:34:57,905 INFO L267 CfgBuilder]: Building CFG for each procedure with an implementation [2023-11-23 20:34:58,885 INFO L282 CfgBuilder]: Performing block encoding [2023-11-23 20:34:59,201 INFO L304 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2023-11-23 20:34:59,201 INFO L309 CfgBuilder]: Removed 0 assume(true) statements. [2023-11-23 20:34:59,204 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:59 BoogieIcfgContainer [2023-11-23 20:34:59,204 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2023-11-23 20:34:59,207 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2023-11-23 20:34:59,207 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2023-11-23 20:34:59,211 INFO L274 PluginConnector]: TraceAbstraction initialized [2023-11-23 20:34:59,212 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 23.11 08:34:56" (1/3) ... [2023-11-23 20:34:59,214 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb785d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:59, skipping insertion in model container [2023-11-23 20:34:59,216 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 23.11 08:34:57" (2/3) ... [2023-11-23 20:34:59,219 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@58bb785d and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 23.11 08:34:59, skipping insertion in model container [2023-11-23 20:34:59,219 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 23.11 08:34:59" (3/3) ... [2023-11-23 20:34:59,223 INFO L112 eAbstractionObserver]: Analyzing ICFG pals_lcr-var-start-time.4.ufo.BOUNDED-8.pals.c.v+nlh-reducer.c [2023-11-23 20:34:59,245 INFO L203 ceAbstractionStarter]: Automizer settings: Hoare:true NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2023-11-23 20:34:59,245 INFO L162 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2023-11-23 20:34:59,325 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2023-11-23 20:34:59,332 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;@5bd051e2, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2023-11-23 20:34:59,333 INFO L358 AbstractCegarLoop]: Starting to check reachability of 1 error locations. [2023-11-23 20:34:59,338 INFO L276 IsEmpty]: Start isEmpty. Operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:34:59,347 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 55 [2023-11-23 20:34:59,347 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:34:59,348 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:34:59,349 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:34:59,355 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:34:59,355 INFO L85 PathProgramCache]: Analyzing trace with hash 393435605, now seen corresponding path program 1 times [2023-11-23 20:34:59,366 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:34:59,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1182770188] [2023-11-23 20:34:59,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:34:59,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:34:59,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:00,164 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:00,165 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:00,165 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1182770188] [2023-11-23 20:35:00,166 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1182770188] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:00,166 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:00,167 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2023-11-23 20:35:00,168 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731222007] [2023-11-23 20:35:00,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:00,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2023-11-23 20:35:00,175 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:00,205 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2023-11-23 20:35:00,206 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:00,209 INFO L87 Difference]: Start difference. First operand has 134 states, 132 states have (on average 1.7045454545454546) internal successors, (225), 133 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:00,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:00,499 INFO L93 Difference]: Finished difference Result 406 states and 650 transitions. [2023-11-23 20:35:00,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2023-11-23 20:35:00,503 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 54 [2023-11-23 20:35:00,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:00,518 INFO L225 Difference]: With dead ends: 406 [2023-11-23 20:35:00,527 INFO L226 Difference]: Without dead ends: 324 [2023-11-23 20:35:00,531 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2023-11-23 20:35:00,537 INFO L413 NwaCegarLoop]: 293 mSDtfsCounter, 785 mSDsluCounter, 351 mSDsCounter, 0 mSdLazyCounter, 97 mSolverCounterSat, 22 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 785 SdHoareTripleChecker+Valid, 644 SdHoareTripleChecker+Invalid, 119 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 22 IncrementalHoareTripleChecker+Valid, 97 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:00,539 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [785 Valid, 644 Invalid, 119 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [22 Valid, 97 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:00,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 324 states. [2023-11-23 20:35:00,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 324 to 318. [2023-11-23 20:35:00,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 318 states, 317 states have (on average 1.384858044164038) internal successors, (439), 317 states have internal predecessors, (439), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:00,601 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 318 states to 318 states and 439 transitions. [2023-11-23 20:35:00,603 INFO L78 Accepts]: Start accepts. Automaton has 318 states and 439 transitions. Word has length 54 [2023-11-23 20:35:00,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:00,604 INFO L495 AbstractCegarLoop]: Abstraction has 318 states and 439 transitions. [2023-11-23 20:35:00,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 9.0) internal successors, (54), 6 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:00,605 INFO L276 IsEmpty]: Start isEmpty. Operand 318 states and 439 transitions. [2023-11-23 20:35:00,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:35:00,608 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:00,608 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:00,609 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2023-11-23 20:35:00,609 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:00,610 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:00,610 INFO L85 PathProgramCache]: Analyzing trace with hash -1384247623, now seen corresponding path program 1 times [2023-11-23 20:35:00,610 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:00,611 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713000793] [2023-11-23 20:35:00,611 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:00,611 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:00,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:00,887 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:00,888 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:00,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713000793] [2023-11-23 20:35:00,889 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713000793] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:00,889 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:00,889 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:00,889 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [105092636] [2023-11-23 20:35:00,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:00,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:00,892 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:00,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:00,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:35:00,893 INFO L87 Difference]: Start difference. First operand 318 states and 439 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:01,192 INFO L93 Difference]: Finished difference Result 764 states and 1085 transitions. [2023-11-23 20:35:01,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:35:01,193 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:35:01,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:01,197 INFO L225 Difference]: With dead ends: 764 [2023-11-23 20:35:01,198 INFO L226 Difference]: Without dead ends: 496 [2023-11-23 20:35:01,200 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:01,201 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 468 mSDsluCounter, 56 mSDsCounter, 0 mSdLazyCounter, 172 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 468 SdHoareTripleChecker+Valid, 188 SdHoareTripleChecker+Invalid, 176 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 172 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:01,202 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [468 Valid, 188 Invalid, 176 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 172 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:01,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 496 states. [2023-11-23 20:35:01,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 496 to 494. [2023-11-23 20:35:01,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 494 states, 493 states have (on average 1.4137931034482758) internal successors, (697), 493 states have internal predecessors, (697), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 494 states to 494 states and 697 transitions. [2023-11-23 20:35:01,233 INFO L78 Accepts]: Start accepts. Automaton has 494 states and 697 transitions. Word has length 55 [2023-11-23 20:35:01,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:01,233 INFO L495 AbstractCegarLoop]: Abstraction has 494 states and 697 transitions. [2023-11-23 20:35:01,234 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,234 INFO L276 IsEmpty]: Start isEmpty. Operand 494 states and 697 transitions. [2023-11-23 20:35:01,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:35:01,237 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:01,237 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:01,238 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2023-11-23 20:35:01,238 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:01,238 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:01,239 INFO L85 PathProgramCache]: Analyzing trace with hash 1599190295, now seen corresponding path program 1 times [2023-11-23 20:35:01,239 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:01,239 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297697791] [2023-11-23 20:35:01,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:01,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:01,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:01,411 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:01,412 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:01,412 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297697791] [2023-11-23 20:35:01,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1297697791] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:01,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:01,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:01,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524846434] [2023-11-23 20:35:01,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:01,415 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:01,415 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:01,416 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:01,416 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:35:01,416 INFO L87 Difference]: Start difference. First operand 494 states and 697 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:01,637 INFO L93 Difference]: Finished difference Result 1242 states and 1795 transitions. [2023-11-23 20:35:01,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:35:01,638 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:35:01,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:01,644 INFO L225 Difference]: With dead ends: 1242 [2023-11-23 20:35:01,645 INFO L226 Difference]: Without dead ends: 848 [2023-11-23 20:35:01,656 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:01,659 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 440 mSDsluCounter, 72 mSDsCounter, 0 mSdLazyCounter, 168 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 440 SdHoareTripleChecker+Valid, 204 SdHoareTripleChecker+Invalid, 172 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 168 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:01,659 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [440 Valid, 204 Invalid, 172 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 168 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:01,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 848 states. [2023-11-23 20:35:01,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 848 to 846. [2023-11-23 20:35:01,699 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 846 states, 845 states have (on average 1.4355029585798817) internal successors, (1213), 845 states have internal predecessors, (1213), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 846 states to 846 states and 1213 transitions. [2023-11-23 20:35:01,704 INFO L78 Accepts]: Start accepts. Automaton has 846 states and 1213 transitions. Word has length 55 [2023-11-23 20:35:01,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:01,711 INFO L495 AbstractCegarLoop]: Abstraction has 846 states and 1213 transitions. [2023-11-23 20:35:01,712 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:01,713 INFO L276 IsEmpty]: Start isEmpty. Operand 846 states and 1213 transitions. [2023-11-23 20:35:01,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:35:01,720 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:01,720 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:01,720 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2023-11-23 20:35:01,720 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:01,721 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:01,721 INFO L85 PathProgramCache]: Analyzing trace with hash -982122296, now seen corresponding path program 1 times [2023-11-23 20:35:01,721 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:01,721 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2030894596] [2023-11-23 20:35:01,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:01,722 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:01,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:01,859 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:01,860 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:01,860 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2030894596] [2023-11-23 20:35:01,860 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2030894596] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:01,860 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:01,860 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:01,860 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131168595] [2023-11-23 20:35:01,861 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:01,861 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:01,861 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:01,862 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:01,862 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:35:01,862 INFO L87 Difference]: Start difference. First operand 846 states and 1213 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,080 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:02,080 INFO L93 Difference]: Finished difference Result 2325 states and 3384 transitions. [2023-11-23 20:35:02,081 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:35:02,081 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:35:02,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:02,091 INFO L225 Difference]: With dead ends: 2325 [2023-11-23 20:35:02,092 INFO L226 Difference]: Without dead ends: 1552 [2023-11-23 20:35:02,093 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:02,104 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 445 mSDsluCounter, 64 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 445 SdHoareTripleChecker+Valid, 196 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:02,105 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [445 Valid, 196 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:02,109 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 1552 states. [2023-11-23 20:35:02,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 1552 to 1550. [2023-11-23 20:35:02,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 1550 states, 1549 states have (on average 1.4441575209812783) internal successors, (2237), 1549 states have internal predecessors, (2237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 1550 states to 1550 states and 2237 transitions. [2023-11-23 20:35:02,154 INFO L78 Accepts]: Start accepts. Automaton has 1550 states and 2237 transitions. Word has length 55 [2023-11-23 20:35:02,155 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:02,155 INFO L495 AbstractCegarLoop]: Abstraction has 1550 states and 2237 transitions. [2023-11-23 20:35:02,155 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,156 INFO L276 IsEmpty]: Start isEmpty. Operand 1550 states and 2237 transitions. [2023-11-23 20:35:02,159 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 56 [2023-11-23 20:35:02,159 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:02,159 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:02,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2023-11-23 20:35:02,160 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:02,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:02,161 INFO L85 PathProgramCache]: Analyzing trace with hash -327196950, now seen corresponding path program 1 times [2023-11-23 20:35:02,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:02,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1025722545] [2023-11-23 20:35:02,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:02,162 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:02,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:02,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:02,343 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:02,343 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1025722545] [2023-11-23 20:35:02,343 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1025722545] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:02,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:02,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2023-11-23 20:35:02,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587483432] [2023-11-23 20:35:02,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:02,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2023-11-23 20:35:02,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:02,346 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2023-11-23 20:35:02,346 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2023-11-23 20:35:02,346 INFO L87 Difference]: Start difference. First operand 1550 states and 2237 transitions. Second operand has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:02,564 INFO L93 Difference]: Finished difference Result 4172 states and 6061 transitions. [2023-11-23 20:35:02,565 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2023-11-23 20:35:02,565 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 55 [2023-11-23 20:35:02,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:02,582 INFO L225 Difference]: With dead ends: 4172 [2023-11-23 20:35:02,582 INFO L226 Difference]: Without dead ends: 2656 [2023-11-23 20:35:02,585 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2023-11-23 20:35:02,586 INFO L413 NwaCegarLoop]: 132 mSDtfsCounter, 461 mSDsluCounter, 48 mSDsCounter, 0 mSdLazyCounter, 167 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.1s Time, 0 mProtectedPredicate, 0 mProtectedAction, 461 SdHoareTripleChecker+Valid, 180 SdHoareTripleChecker+Invalid, 171 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 167 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.2s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:02,586 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [461 Valid, 180 Invalid, 171 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 167 Invalid, 0 Unknown, 0 Unchecked, 0.2s Time] [2023-11-23 20:35:02,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 2656 states. [2023-11-23 20:35:02,643 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 2656 to 2654. [2023-11-23 20:35:02,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 2654 states, 2653 states have (on average 1.4364869958537505) internal successors, (3811), 2653 states have internal predecessors, (3811), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 2654 states to 2654 states and 3811 transitions. [2023-11-23 20:35:02,660 INFO L78 Accepts]: Start accepts. Automaton has 2654 states and 3811 transitions. Word has length 55 [2023-11-23 20:35:02,660 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:02,660 INFO L495 AbstractCegarLoop]: Abstraction has 2654 states and 3811 transitions. [2023-11-23 20:35:02,661 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 11.0) internal successors, (55), 4 states have internal predecessors, (55), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:02,661 INFO L276 IsEmpty]: Start isEmpty. Operand 2654 states and 3811 transitions. [2023-11-23 20:35:02,662 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:35:02,662 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:02,662 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:02,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2023-11-23 20:35:02,663 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:02,663 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:02,663 INFO L85 PathProgramCache]: Analyzing trace with hash 983783721, now seen corresponding path program 1 times [2023-11-23 20:35:02,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:02,664 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1819242010] [2023-11-23 20:35:02,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:02,664 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:02,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:05,488 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:05,489 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:05,489 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1819242010] [2023-11-23 20:35:05,489 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1819242010] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:05,489 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:05,489 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 20:35:05,490 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000307489] [2023-11-23 20:35:05,490 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:05,490 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 20:35:05,491 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:05,491 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 20:35:05,492 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=354, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:35:05,492 INFO L87 Difference]: Start difference. First operand 2654 states and 3811 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:08,006 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:08,007 INFO L93 Difference]: Finished difference Result 5534 states and 7934 transitions. [2023-11-23 20:35:08,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2023-11-23 20:35:08,012 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:35:08,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:08,046 INFO L225 Difference]: With dead ends: 5534 [2023-11-23 20:35:08,047 INFO L226 Difference]: Without dead ends: 5532 [2023-11-23 20:35:08,053 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=298, Invalid=1034, Unknown=0, NotChecked=0, Total=1332 [2023-11-23 20:35:08,054 INFO L413 NwaCegarLoop]: 125 mSDtfsCounter, 987 mSDsluCounter, 1037 mSDsCounter, 0 mSdLazyCounter, 1487 mSolverCounterSat, 6 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.2s Time, 0 mProtectedPredicate, 0 mProtectedAction, 987 SdHoareTripleChecker+Valid, 1162 SdHoareTripleChecker+Invalid, 1493 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 6 IncrementalHoareTripleChecker+Valid, 1487 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:08,054 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [987 Valid, 1162 Invalid, 1493 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [6 Valid, 1487 Invalid, 0 Unknown, 0 Unchecked, 1.4s Time] [2023-11-23 20:35:08,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5532 states. [2023-11-23 20:35:08,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5532 to 4549. [2023-11-23 20:35:08,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4549 states, 4548 states have (on average 1.4316182937554969) internal successors, (6511), 4548 states have internal predecessors, (6511), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:08,204 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4549 states to 4549 states and 6511 transitions. [2023-11-23 20:35:08,204 INFO L78 Accepts]: Start accepts. Automaton has 4549 states and 6511 transitions. Word has length 56 [2023-11-23 20:35:08,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:08,205 INFO L495 AbstractCegarLoop]: Abstraction has 4549 states and 6511 transitions. [2023-11-23 20:35:08,205 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:08,205 INFO L276 IsEmpty]: Start isEmpty. Operand 4549 states and 6511 transitions. [2023-11-23 20:35:08,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:35:08,207 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:08,207 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:08,207 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2023-11-23 20:35:08,207 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:08,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:08,208 INFO L85 PathProgramCache]: Analyzing trace with hash -733857559, now seen corresponding path program 1 times [2023-11-23 20:35:08,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:08,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127315065] [2023-11-23 20:35:08,209 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:08,209 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:08,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:09,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:09,708 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:09,708 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127315065] [2023-11-23 20:35:09,708 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1127315065] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:09,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:09,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [16] imperfect sequences [] total 16 [2023-11-23 20:35:09,709 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [258012995] [2023-11-23 20:35:09,709 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:09,709 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2023-11-23 20:35:09,709 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:09,710 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2023-11-23 20:35:09,710 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2023-11-23 20:35:09,711 INFO L87 Difference]: Start difference. First operand 4549 states and 6511 transitions. Second operand has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:10,720 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:10,721 INFO L93 Difference]: Finished difference Result 5234 states and 7461 transitions. [2023-11-23 20:35:10,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:35:10,723 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:35:10,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:10,752 INFO L225 Difference]: With dead ends: 5234 [2023-11-23 20:35:10,752 INFO L226 Difference]: Without dead ends: 5232 [2023-11-23 20:35:10,755 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=189, Invalid=513, Unknown=0, NotChecked=0, Total=702 [2023-11-23 20:35:10,756 INFO L413 NwaCegarLoop]: 251 mSDtfsCounter, 950 mSDsluCounter, 1384 mSDsCounter, 0 mSdLazyCounter, 596 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 950 SdHoareTripleChecker+Valid, 1635 SdHoareTripleChecker+Invalid, 610 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 596 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:10,756 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [950 Valid, 1635 Invalid, 610 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 596 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:35:10,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5232 states. [2023-11-23 20:35:10,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5232 to 4569. [2023-11-23 20:35:10,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4569 states, 4568 states have (on average 1.430385288966725) internal successors, (6534), 4568 states have internal predecessors, (6534), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:10,936 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4569 states to 4569 states and 6534 transitions. [2023-11-23 20:35:10,936 INFO L78 Accepts]: Start accepts. Automaton has 4569 states and 6534 transitions. Word has length 56 [2023-11-23 20:35:10,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:10,936 INFO L495 AbstractCegarLoop]: Abstraction has 4569 states and 6534 transitions. [2023-11-23 20:35:10,937 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 16 states have (on average 3.5) internal successors, (56), 16 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:10,937 INFO L276 IsEmpty]: Start isEmpty. Operand 4569 states and 6534 transitions. [2023-11-23 20:35:10,937 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:35:10,938 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:10,938 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:10,938 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2023-11-23 20:35:10,938 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:10,938 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:10,938 INFO L85 PathProgramCache]: Analyzing trace with hash -372497143, now seen corresponding path program 1 times [2023-11-23 20:35:10,939 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:10,939 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492797590] [2023-11-23 20:35:10,939 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:10,939 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:11,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:13,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:13,220 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:13,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492797590] [2023-11-23 20:35:13,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [492797590] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:13,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:13,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [20] imperfect sequences [] total 20 [2023-11-23 20:35:13,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [567592091] [2023-11-23 20:35:13,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:13,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 21 states [2023-11-23 20:35:13,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:13,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2023-11-23 20:35:13,223 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=352, Unknown=0, NotChecked=0, Total=420 [2023-11-23 20:35:13,223 INFO L87 Difference]: Start difference. First operand 4569 states and 6534 transitions. Second operand has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:15,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:15,599 INFO L93 Difference]: Finished difference Result 6364 states and 9085 transitions. [2023-11-23 20:35:15,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 20:35:15,612 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:35:15,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:15,652 INFO L225 Difference]: With dead ends: 6364 [2023-11-23 20:35:15,652 INFO L226 Difference]: Without dead ends: 6362 [2023-11-23 20:35:15,655 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=271, Invalid=989, Unknown=0, NotChecked=0, Total=1260 [2023-11-23 20:35:15,656 INFO L413 NwaCegarLoop]: 163 mSDtfsCounter, 830 mSDsluCounter, 1268 mSDsCounter, 0 mSdLazyCounter, 1934 mSolverCounterSat, 4 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 1.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 830 SdHoareTripleChecker+Valid, 1431 SdHoareTripleChecker+Invalid, 1938 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 4 IncrementalHoareTripleChecker+Valid, 1934 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 1.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:15,657 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [830 Valid, 1431 Invalid, 1938 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [4 Valid, 1934 Invalid, 0 Unknown, 0 Unchecked, 1.6s Time] [2023-11-23 20:35:15,665 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6362 states. [2023-11-23 20:35:15,782 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6362 to 4585. [2023-11-23 20:35:15,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 4585 states, 4584 states have (on average 1.4293193717277486) internal successors, (6552), 4584 states have internal predecessors, (6552), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:15,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4585 states to 4585 states and 6552 transitions. [2023-11-23 20:35:15,806 INFO L78 Accepts]: Start accepts. Automaton has 4585 states and 6552 transitions. Word has length 56 [2023-11-23 20:35:15,806 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:15,806 INFO L495 AbstractCegarLoop]: Abstraction has 4585 states and 6552 transitions. [2023-11-23 20:35:15,806 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 21 states, 21 states have (on average 2.6666666666666665) internal successors, (56), 20 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:15,807 INFO L276 IsEmpty]: Start isEmpty. Operand 4585 states and 6552 transitions. [2023-11-23 20:35:15,807 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 57 [2023-11-23 20:35:15,808 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:15,808 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:15,808 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2023-11-23 20:35:15,808 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:15,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:15,809 INFO L85 PathProgramCache]: Analyzing trace with hash -151530167, now seen corresponding path program 1 times [2023-11-23 20:35:15,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:15,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [486828185] [2023-11-23 20:35:15,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:15,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:15,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:16,976 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:16,976 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:16,976 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [486828185] [2023-11-23 20:35:16,977 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [486828185] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:16,977 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:16,977 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 20:35:16,977 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [166867453] [2023-11-23 20:35:16,977 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:16,977 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:35:16,978 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:16,978 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:35:16,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=232, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:16,979 INFO L87 Difference]: Start difference. First operand 4585 states and 6552 transitions. Second operand has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:18,052 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:18,052 INFO L93 Difference]: Finished difference Result 9087 states and 13083 transitions. [2023-11-23 20:35:18,053 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2023-11-23 20:35:18,053 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 56 [2023-11-23 20:35:18,053 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:18,080 INFO L225 Difference]: With dead ends: 9087 [2023-11-23 20:35:18,080 INFO L226 Difference]: Without dead ends: 6861 [2023-11-23 20:35:18,085 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=269, Invalid=723, Unknown=0, NotChecked=0, Total=992 [2023-11-23 20:35:18,086 INFO L413 NwaCegarLoop]: 254 mSDtfsCounter, 698 mSDsluCounter, 1461 mSDsCounter, 0 mSdLazyCounter, 565 mSolverCounterSat, 27 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 698 SdHoareTripleChecker+Valid, 1715 SdHoareTripleChecker+Invalid, 592 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 27 IncrementalHoareTripleChecker+Valid, 565 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:18,086 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [698 Valid, 1715 Invalid, 592 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [27 Valid, 565 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:35:18,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6861 states. [2023-11-23 20:35:18,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6861 to 5878. [2023-11-23 20:35:18,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5878 states, 5877 states have (on average 1.4185809086268504) internal successors, (8337), 5877 states have internal predecessors, (8337), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:18,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5878 states to 5878 states and 8337 transitions. [2023-11-23 20:35:18,217 INFO L78 Accepts]: Start accepts. Automaton has 5878 states and 8337 transitions. Word has length 56 [2023-11-23 20:35:18,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:18,218 INFO L495 AbstractCegarLoop]: Abstraction has 5878 states and 8337 transitions. [2023-11-23 20:35:18,218 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.111111111111111) internal successors, (56), 18 states have internal predecessors, (56), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:18,218 INFO L276 IsEmpty]: Start isEmpty. Operand 5878 states and 8337 transitions. [2023-11-23 20:35:18,219 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:18,219 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:18,219 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:18,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2023-11-23 20:35:18,220 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:18,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:18,220 INFO L85 PathProgramCache]: Analyzing trace with hash -345001155, now seen corresponding path program 1 times [2023-11-23 20:35:18,221 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:18,221 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764363686] [2023-11-23 20:35:18,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:18,221 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:19,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:19,456 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:19,456 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764363686] [2023-11-23 20:35:19,456 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [764363686] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:19,456 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:19,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:35:19,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79266498] [2023-11-23 20:35:19,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:19,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:35:19,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:19,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:35:19,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:35:19,458 INFO L87 Difference]: Start difference. First operand 5878 states and 8337 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:20,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:20,296 INFO L93 Difference]: Finished difference Result 9921 states and 14109 transitions. [2023-11-23 20:35:20,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:35:20,297 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:20,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:20,320 INFO L225 Difference]: With dead ends: 9921 [2023-11-23 20:35:20,320 INFO L226 Difference]: Without dead ends: 9919 [2023-11-23 20:35:20,324 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=596, Unknown=0, NotChecked=0, Total=812 [2023-11-23 20:35:20,325 INFO L413 NwaCegarLoop]: 190 mSDtfsCounter, 693 mSDsluCounter, 811 mSDsCounter, 0 mSdLazyCounter, 416 mSolverCounterSat, 10 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 693 SdHoareTripleChecker+Valid, 1001 SdHoareTripleChecker+Invalid, 426 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 10 IncrementalHoareTripleChecker+Valid, 416 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:20,325 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [693 Valid, 1001 Invalid, 426 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [10 Valid, 416 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:20,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9919 states. [2023-11-23 20:35:20,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9919 to 5887. [2023-11-23 20:35:20,475 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5887 states, 5886 states have (on average 1.4181107713217804) internal successors, (8347), 5886 states have internal predecessors, (8347), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:20,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5887 states to 5887 states and 8347 transitions. [2023-11-23 20:35:20,488 INFO L78 Accepts]: Start accepts. Automaton has 5887 states and 8347 transitions. Word has length 58 [2023-11-23 20:35:20,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:20,488 INFO L495 AbstractCegarLoop]: Abstraction has 5887 states and 8347 transitions. [2023-11-23 20:35:20,489 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:20,489 INFO L276 IsEmpty]: Start isEmpty. Operand 5887 states and 8347 transitions. [2023-11-23 20:35:20,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:20,490 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:20,491 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:20,491 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2023-11-23 20:35:20,491 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:20,491 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:20,492 INFO L85 PathProgramCache]: Analyzing trace with hash 16359261, now seen corresponding path program 1 times [2023-11-23 20:35:20,492 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:20,492 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208324923] [2023-11-23 20:35:20,492 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:20,492 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:20,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:21,741 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:21,741 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:21,741 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208324923] [2023-11-23 20:35:21,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208324923] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:21,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:21,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:35:21,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1927832865] [2023-11-23 20:35:21,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:21,742 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:35:21,742 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:21,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:35:21,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:35:21,743 INFO L87 Difference]: Start difference. First operand 5887 states and 8347 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:22,805 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:22,805 INFO L93 Difference]: Finished difference Result 9268 states and 13146 transitions. [2023-11-23 20:35:22,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2023-11-23 20:35:22,806 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:22,806 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:22,821 INFO L225 Difference]: With dead ends: 9268 [2023-11-23 20:35:22,822 INFO L226 Difference]: Without dead ends: 7634 [2023-11-23 20:35:22,826 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=217, Invalid=595, Unknown=0, NotChecked=0, Total=812 [2023-11-23 20:35:22,826 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 678 mSDsluCounter, 1365 mSDsCounter, 0 mSdLazyCounter, 583 mSolverCounterSat, 12 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 678 SdHoareTripleChecker+Valid, 1633 SdHoareTripleChecker+Invalid, 595 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 12 IncrementalHoareTripleChecker+Valid, 583 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.6s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:22,827 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [678 Valid, 1633 Invalid, 595 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [12 Valid, 583 Invalid, 0 Unknown, 0 Unchecked, 0.6s Time] [2023-11-23 20:35:22,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7634 states. [2023-11-23 20:35:22,972 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7634 to 6604. [2023-11-23 20:35:22,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6604 states, 6603 states have (on average 1.4179918218991368) internal successors, (9363), 6603 states have internal predecessors, (9363), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:22,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6604 states to 6604 states and 9363 transitions. [2023-11-23 20:35:22,999 INFO L78 Accepts]: Start accepts. Automaton has 6604 states and 9363 transitions. Word has length 58 [2023-11-23 20:35:22,999 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:22,999 INFO L495 AbstractCegarLoop]: Abstraction has 6604 states and 9363 transitions. [2023-11-23 20:35:23,000 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:23,001 INFO L276 IsEmpty]: Start isEmpty. Operand 6604 states and 9363 transitions. [2023-11-23 20:35:23,002 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:23,002 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:23,002 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:23,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2023-11-23 20:35:23,002 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:23,003 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:23,003 INFO L85 PathProgramCache]: Analyzing trace with hash 1939146525, now seen corresponding path program 1 times [2023-11-23 20:35:23,004 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:23,004 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [983477422] [2023-11-23 20:35:23,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:23,004 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:23,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:24,182 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:24,182 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:24,183 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [983477422] [2023-11-23 20:35:24,183 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [983477422] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:24,183 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:24,183 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:35:24,183 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [188745291] [2023-11-23 20:35:24,184 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:24,184 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:35:24,184 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:24,185 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:35:24,185 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=202, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:35:24,185 INFO L87 Difference]: Start difference. First operand 6604 states and 9363 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:24,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:24,871 INFO L93 Difference]: Finished difference Result 7671 states and 10858 transitions. [2023-11-23 20:35:24,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2023-11-23 20:35:24,873 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:24,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:24,886 INFO L225 Difference]: With dead ends: 7671 [2023-11-23 20:35:24,887 INFO L226 Difference]: Without dead ends: 7669 [2023-11-23 20:35:24,890 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=203, Invalid=553, Unknown=0, NotChecked=0, Total=756 [2023-11-23 20:35:24,891 INFO L413 NwaCegarLoop]: 258 mSDtfsCounter, 618 mSDsluCounter, 792 mSDsCounter, 0 mSdLazyCounter, 370 mSolverCounterSat, 9 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.3s Time, 0 mProtectedPredicate, 0 mProtectedAction, 618 SdHoareTripleChecker+Valid, 1050 SdHoareTripleChecker+Invalid, 379 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 9 IncrementalHoareTripleChecker+Valid, 370 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.3s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:24,891 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [618 Valid, 1050 Invalid, 379 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [9 Valid, 370 Invalid, 0 Unknown, 0 Unchecked, 0.3s Time] [2023-11-23 20:35:24,898 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 7669 states. [2023-11-23 20:35:24,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 7669 to 6617. [2023-11-23 20:35:24,996 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 6617 states, 6616 states have (on average 1.4176239419588876) internal successors, (9379), 6616 states have internal predecessors, (9379), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:25,011 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6617 states to 6617 states and 9379 transitions. [2023-11-23 20:35:25,012 INFO L78 Accepts]: Start accepts. Automaton has 6617 states and 9379 transitions. Word has length 58 [2023-11-23 20:35:25,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:25,012 INFO L495 AbstractCegarLoop]: Abstraction has 6617 states and 9379 transitions. [2023-11-23 20:35:25,012 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:25,012 INFO L276 IsEmpty]: Start isEmpty. Operand 6617 states and 9379 transitions. [2023-11-23 20:35:25,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:25,013 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:25,014 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:25,014 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2023-11-23 20:35:25,014 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:25,015 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:25,015 INFO L85 PathProgramCache]: Analyzing trace with hash 1257686941, now seen corresponding path program 1 times [2023-11-23 20:35:25,015 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:25,015 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3128152] [2023-11-23 20:35:25,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:25,016 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:25,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:26,402 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:26,402 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:26,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3128152] [2023-11-23 20:35:26,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [3128152] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:26,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:26,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 20:35:26,403 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1349263324] [2023-11-23 20:35:26,403 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:26,403 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:35:26,403 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:26,404 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:35:26,404 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=231, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:26,404 INFO L87 Difference]: Start difference. First operand 6617 states and 9379 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:27,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:27,458 INFO L93 Difference]: Finished difference Result 12211 states and 17401 transitions. [2023-11-23 20:35:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2023-11-23 20:35:27,459 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:27,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:27,475 INFO L225 Difference]: With dead ends: 12211 [2023-11-23 20:35:27,475 INFO L226 Difference]: Without dead ends: 9105 [2023-11-23 20:35:27,480 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=252, Invalid=678, Unknown=0, NotChecked=0, Total=930 [2023-11-23 20:35:27,481 INFO L413 NwaCegarLoop]: 184 mSDtfsCounter, 469 mSDsluCounter, 1117 mSDsCounter, 0 mSdLazyCounter, 508 mSolverCounterSat, 18 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.5s Time, 0 mProtectedPredicate, 0 mProtectedAction, 469 SdHoareTripleChecker+Valid, 1301 SdHoareTripleChecker+Invalid, 526 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 18 IncrementalHoareTripleChecker+Valid, 508 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.5s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:27,482 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [469 Valid, 1301 Invalid, 526 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [18 Valid, 508 Invalid, 0 Unknown, 0 Unchecked, 0.5s Time] [2023-11-23 20:35:27,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 9105 states. [2023-11-23 20:35:27,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 9105 to 7646. [2023-11-23 20:35:27,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 7646 states, 7645 states have (on average 1.4153041203400916) internal successors, (10820), 7645 states have internal predecessors, (10820), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:27,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7646 states to 7646 states and 10820 transitions. [2023-11-23 20:35:27,638 INFO L78 Accepts]: Start accepts. Automaton has 7646 states and 10820 transitions. Word has length 58 [2023-11-23 20:35:27,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:27,638 INFO L495 AbstractCegarLoop]: Abstraction has 7646 states and 10820 transitions. [2023-11-23 20:35:27,638 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:27,639 INFO L276 IsEmpty]: Start isEmpty. Operand 7646 states and 10820 transitions. [2023-11-23 20:35:27,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:27,640 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:27,640 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:27,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2023-11-23 20:35:27,640 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:27,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:27,641 INFO L85 PathProgramCache]: Analyzing trace with hash -459954339, now seen corresponding path program 1 times [2023-11-23 20:35:27,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:27,642 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102862168] [2023-11-23 20:35:27,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:27,642 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:27,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:28,900 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:28,900 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:28,900 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102862168] [2023-11-23 20:35:28,900 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102862168] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:28,901 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:28,901 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [18] imperfect sequences [] total 18 [2023-11-23 20:35:28,901 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258463580] [2023-11-23 20:35:28,901 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:28,901 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2023-11-23 20:35:28,901 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:28,902 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2023-11-23 20:35:28,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2023-11-23 20:35:28,903 INFO L87 Difference]: Start difference. First operand 7646 states and 10820 transitions. Second operand has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:30,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:30,332 INFO L93 Difference]: Finished difference Result 12602 states and 17835 transitions. [2023-11-23 20:35:30,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2023-11-23 20:35:30,332 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:30,333 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:30,352 INFO L225 Difference]: With dead ends: 12602 [2023-11-23 20:35:30,352 INFO L226 Difference]: Without dead ends: 12600 [2023-11-23 20:35:30,356 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 184 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=299, Invalid=823, Unknown=0, NotChecked=0, Total=1122 [2023-11-23 20:35:30,357 INFO L413 NwaCegarLoop]: 290 mSDtfsCounter, 675 mSDsluCounter, 1356 mSDsCounter, 0 mSdLazyCounter, 830 mSolverCounterSat, 20 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.6s Time, 0 mProtectedPredicate, 0 mProtectedAction, 675 SdHoareTripleChecker+Valid, 1646 SdHoareTripleChecker+Invalid, 850 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 20 IncrementalHoareTripleChecker+Valid, 830 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.8s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:30,357 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [675 Valid, 1646 Invalid, 850 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [20 Valid, 830 Invalid, 0 Unknown, 0 Unchecked, 0.8s Time] [2023-11-23 20:35:30,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12600 states. [2023-11-23 20:35:30,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12600 to 8302. [2023-11-23 20:35:30,551 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8302 states, 8301 states have (on average 1.4169377183471872) internal successors, (11762), 8301 states have internal predecessors, (11762), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:30,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8302 states to 8302 states and 11762 transitions. [2023-11-23 20:35:30,568 INFO L78 Accepts]: Start accepts. Automaton has 8302 states and 11762 transitions. Word has length 58 [2023-11-23 20:35:30,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:30,568 INFO L495 AbstractCegarLoop]: Abstraction has 8302 states and 11762 transitions. [2023-11-23 20:35:30,568 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 18 states have (on average 3.2222222222222223) internal successors, (58), 18 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:30,569 INFO L276 IsEmpty]: Start isEmpty. Operand 8302 states and 11762 transitions. [2023-11-23 20:35:30,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 59 [2023-11-23 20:35:30,570 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:30,570 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:30,570 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2023-11-23 20:35:30,570 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:30,571 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:30,571 INFO L85 PathProgramCache]: Analyzing trace with hash -98593923, now seen corresponding path program 1 times [2023-11-23 20:35:30,571 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:30,572 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379670026] [2023-11-23 20:35:30,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:30,572 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:30,604 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:31,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:31,590 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:31,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379670026] [2023-11-23 20:35:31,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379670026] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:31,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:31,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [17] imperfect sequences [] total 17 [2023-11-23 20:35:31,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1622017455] [2023-11-23 20:35:31,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:31,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2023-11-23 20:35:31,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:31,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2023-11-23 20:35:31,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2023-11-23 20:35:31,592 INFO L87 Difference]: Start difference. First operand 8302 states and 11762 transitions. Second operand has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:32,387 INFO L93 Difference]: Finished difference Result 12891 states and 18207 transitions. [2023-11-23 20:35:32,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2023-11-23 20:35:32,388 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 58 [2023-11-23 20:35:32,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:32,406 INFO L225 Difference]: With dead ends: 12891 [2023-11-23 20:35:32,406 INFO L226 Difference]: Without dead ends: 12073 [2023-11-23 20:35:32,411 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=198, Invalid=558, Unknown=0, NotChecked=0, Total=756 [2023-11-23 20:35:32,412 INFO L413 NwaCegarLoop]: 268 mSDtfsCounter, 651 mSDsluCounter, 1489 mSDsCounter, 0 mSdLazyCounter, 481 mSolverCounterSat, 14 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.4s Time, 0 mProtectedPredicate, 0 mProtectedAction, 651 SdHoareTripleChecker+Valid, 1757 SdHoareTripleChecker+Invalid, 495 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 14 IncrementalHoareTripleChecker+Valid, 481 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.4s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:32,412 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [651 Valid, 1757 Invalid, 495 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [14 Valid, 481 Invalid, 0 Unknown, 0 Unchecked, 0.4s Time] [2023-11-23 20:35:32,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 12073 states. [2023-11-23 20:35:32,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 12073 to 8308. [2023-11-23 20:35:32,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 8308 states, 8307 states have (on average 1.4168773323702901) internal successors, (11770), 8307 states have internal predecessors, (11770), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8308 states to 8308 states and 11770 transitions. [2023-11-23 20:35:32,593 INFO L78 Accepts]: Start accepts. Automaton has 8308 states and 11770 transitions. Word has length 58 [2023-11-23 20:35:32,593 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:32,593 INFO L495 AbstractCegarLoop]: Abstraction has 8308 states and 11770 transitions. [2023-11-23 20:35:32,594 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 17 states have (on average 3.411764705882353) internal successors, (58), 17 states have internal predecessors, (58), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,594 INFO L276 IsEmpty]: Start isEmpty. Operand 8308 states and 11770 transitions. [2023-11-23 20:35:32,595 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 20:35:32,595 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:32,595 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:32,595 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2023-11-23 20:35:32,596 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:32,596 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:32,596 INFO L85 PathProgramCache]: Analyzing trace with hash 757434820, now seen corresponding path program 1 times [2023-11-23 20:35:32,596 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:32,596 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [34270619] [2023-11-23 20:35:32,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:32,597 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:32,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:32,649 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:32,649 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:32,649 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [34270619] [2023-11-23 20:35:32,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [34270619] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:32,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:32,652 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:32,652 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541799733] [2023-11-23 20:35:32,652 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:32,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:32,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:32,654 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:32,654 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:32,654 INFO L87 Difference]: Start difference. First operand 8308 states and 11770 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:32,744 INFO L93 Difference]: Finished difference Result 14269 states and 20249 transitions. [2023-11-23 20:35:32,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:32,744 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-23 20:35:32,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:32,753 INFO L225 Difference]: With dead ends: 14269 [2023-11-23 20:35:32,754 INFO L226 Difference]: Without dead ends: 6159 [2023-11-23 20:35:32,762 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:32,763 INFO L413 NwaCegarLoop]: 216 mSDtfsCounter, 110 mSDsluCounter, 87 mSDsCounter, 0 mSdLazyCounter, 40 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 110 SdHoareTripleChecker+Valid, 303 SdHoareTripleChecker+Invalid, 42 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 40 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:32,763 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [110 Valid, 303 Invalid, 42 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 40 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:35:32,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 6159 states. [2023-11-23 20:35:32,831 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 6159 to 5967. [2023-11-23 20:35:32,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5967 states, 5966 states have (on average 1.411163258464633) internal successors, (8419), 5966 states have internal predecessors, (8419), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5967 states to 5967 states and 8419 transitions. [2023-11-23 20:35:32,850 INFO L78 Accepts]: Start accepts. Automaton has 5967 states and 8419 transitions. Word has length 59 [2023-11-23 20:35:32,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:32,850 INFO L495 AbstractCegarLoop]: Abstraction has 5967 states and 8419 transitions. [2023-11-23 20:35:32,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,850 INFO L276 IsEmpty]: Start isEmpty. Operand 5967 states and 8419 transitions. [2023-11-23 20:35:32,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 60 [2023-11-23 20:35:32,851 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:32,852 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:32,852 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2023-11-23 20:35:32,852 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:32,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:32,853 INFO L85 PathProgramCache]: Analyzing trace with hash 747900149, now seen corresponding path program 1 times [2023-11-23 20:35:32,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:32,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290104024] [2023-11-23 20:35:32,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:32,853 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:32,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:32,903 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:32,903 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:32,903 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290104024] [2023-11-23 20:35:32,903 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1290104024] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:32,904 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:32,904 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2023-11-23 20:35:32,904 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [903181300] [2023-11-23 20:35:32,904 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:32,905 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2023-11-23 20:35:32,905 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:32,905 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2023-11-23 20:35:32,905 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:32,906 INFO L87 Difference]: Start difference. First operand 5967 states and 8419 transitions. Second operand has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:32,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2023-11-23 20:35:32,980 INFO L93 Difference]: Finished difference Result 10280 states and 14557 transitions. [2023-11-23 20:35:32,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2023-11-23 20:35:32,981 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 59 [2023-11-23 20:35:32,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2023-11-23 20:35:32,987 INFO L225 Difference]: With dead ends: 10280 [2023-11-23 20:35:32,987 INFO L226 Difference]: Without dead ends: 5712 [2023-11-23 20:35:32,992 INFO L412 NwaCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 2 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2023-11-23 20:35:32,993 INFO L413 NwaCegarLoop]: 212 mSDtfsCounter, 117 mSDsluCounter, 75 mSDsCounter, 0 mSdLazyCounter, 43 mSolverCounterSat, 2 mSolverCounterUnsat, 0 mSolverCounterUnknown, 0 mSolverCounterNotChecked, 0.0s Time, 0 mProtectedPredicate, 0 mProtectedAction, 117 SdHoareTripleChecker+Valid, 287 SdHoareTripleChecker+Invalid, 45 SdHoareTripleChecker+Unknown, 0 SdHoareTripleChecker+Unchecked, 0.0s SdHoareTripleChecker+Time, 2 IncrementalHoareTripleChecker+Valid, 43 IncrementalHoareTripleChecker+Invalid, 0 IncrementalHoareTripleChecker+Unknown, 0 IncrementalHoareTripleChecker+Unchecked, 0.0s IncrementalHoareTripleChecker+Time [2023-11-23 20:35:32,993 INFO L414 NwaCegarLoop]: SdHoareTripleChecker [117 Valid, 287 Invalid, 45 Unknown, 0 Unchecked, 0.0s Time], IncrementalHoareTripleChecker [2 Valid, 43 Invalid, 0 Unknown, 0 Unchecked, 0.0s Time] [2023-11-23 20:35:32,998 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 5712 states. [2023-11-23 20:35:33,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 5712 to 5710. [2023-11-23 20:35:33,055 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 5710 states, 5709 states have (on average 1.4076020318794886) internal successors, (8036), 5709 states have internal predecessors, (8036), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:33,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5710 states to 5710 states and 8036 transitions. [2023-11-23 20:35:33,067 INFO L78 Accepts]: Start accepts. Automaton has 5710 states and 8036 transitions. Word has length 59 [2023-11-23 20:35:33,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2023-11-23 20:35:33,068 INFO L495 AbstractCegarLoop]: Abstraction has 5710 states and 8036 transitions. [2023-11-23 20:35:33,068 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 19.666666666666668) internal successors, (59), 3 states have internal predecessors, (59), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2023-11-23 20:35:33,068 INFO L276 IsEmpty]: Start isEmpty. Operand 5710 states and 8036 transitions. [2023-11-23 20:35:33,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 61 [2023-11-23 20:35:33,069 INFO L187 NwaCegarLoop]: Found error trace [2023-11-23 20:35:33,069 INFO L195 NwaCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2023-11-23 20:35:33,070 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2023-11-23 20:35:33,070 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION] === [2023-11-23 20:35:33,070 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2023-11-23 20:35:33,070 INFO L85 PathProgramCache]: Analyzing trace with hash 1967996017, now seen corresponding path program 1 times [2023-11-23 20:35:33,071 INFO L118 FreeRefinementEngine]: Executing refinement strategy SIFA_TAIPAN [2023-11-23 20:35:33,071 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [250540364] [2023-11-23 20:35:33,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2023-11-23 20:35:33,071 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2023-11-23 20:35:33,114 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2023-11-23 20:35:36,574 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2023-11-23 20:35:36,575 INFO L136 FreeRefinementEngine]: Strategy SIFA_TAIPAN found an infeasible trace [2023-11-23 20:35:36,575 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [250540364] [2023-11-23 20:35:36,575 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [250540364] provided 1 perfect and 0 imperfect interpolant sequences [2023-11-23 20:35:36,575 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2023-11-23 20:35:36,576 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [24] imperfect sequences [] total 24 [2023-11-23 20:35:36,576 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [718282251] [2023-11-23 20:35:36,576 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2023-11-23 20:35:36,576 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 25 states [2023-11-23 20:35:36,577 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy SIFA_TAIPAN [2023-11-23 20:35:36,577 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2023-11-23 20:35:36,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=511, Unknown=0, NotChecked=0, Total=600 [2023-11-23 20:35:36,578 INFO L87 Difference]: Start difference. First operand 5710 states and 8036 transitions. Second operand has 25 states, 25 states have (on average 2.4) internal successors, (60), 24 states have internal predecessors, (60), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0)